The husband and wife relationship between Hal and Alice Cooper was strained due to Hal's attitude towards their eldest daughter Polly's pregnancy by Jason Blossom. Once Hal revealed that Polly and Jason were distant relatives, Alice became understanding of Hal's opposition, which led to them mending their relationship.
However, this would not be the end of Hal and Alice's marital problems. They began to drift away even further after Betty brought Alice's son, Chic, that she gave up for adoption, home. With him taking up residency at the Cooper house, Hal's hatred for Chic became unignorable, which caused Alice and Hal's relationship to once again become strained, leading him to have an affair with Penelope Blossom not long after leaving the house due to Chic's presence. Eventually, Hal asked for a divorce knowing that Alice would pick Chic over him.
During their senior year at Riverdale High, Alice learned that she was pregnant with another man's baby. At the homecoming dance she told him about the pregnancy, which lead to a big fight between the two, as Hal wanted Alice to abort the baby while Alice wanted to deliver it. She then went to the Sisters of Quiet Mercy, where she lived for five months until the birth of her son, who the sister's arranged to be quietly adopted.
Hal stood alongside Alice, as the local authorities brought Penelope and Cliff Blossom to the shores of Sweetwater River to retrieve their daughter Cheryl, just after the mysterious drowning of Jason Blossom. Alice commented to her husband, she hoped Jason had suffered. The following week, he returned to the shore with his wife and daughter, they were forced to stand by as Jason's body was found and brought to land.
The morning after Jason's body was found, Alice and Hal informed Betty that due to the scandal surrounding his death, they'd be having a lot of late nights at the local newspaper they ran together, The Register. Giddy, Alice said that no one cared about an accidental drowning, but the murder of the sociopathic son of the wealthiest family in town was bound to make headlines. Hal reminded her that Jason was barely in his grave but Alice cut him off and dismissively asked him to start the car.
Hal and Alice attended the first annual Taste of Riverdale event, in celebration of the upcoming 75th anniversary of their town. Once there, Hal was forced to assist in breaking up a violent altercation between his wife and Penelope Blossom, who was angry about what the Coopers had been writing in their newspaper.
After their daughter had missed curfew a few times, Hal and Alice knocked on the door of the Andrews house, Hal first apologized to Fred Andrews for coming unannounced, but it had been a rough couple months for them. Before Hal could finish his sentence, Alice cut him off, she insisted that Archie and Betty stop spending time together. Alice claimed their friendship was toxic, on both sides, and their recent behavior reflected that. After seeing that Fred didn't agree with them, Alice pulled her husband back home.
Having learned that Betty and Jughead secretly visited Polly at the Sisters of Quiet Mercy group home where Alice and Hal had hidden Polly to conceal her pregnancy by Jason Blossom, he questioned if Betty had found what she was looking for while she was there. Much to her disappointment, she hadn't. Betty defended her actions as Polly needed to know the truth, she then accused her father of not only breaking into Sheriff Keller's house, and stealing the files on Jason's murder, but possibly being the murderer. Hal had not attended closing night for the Twilight Drive-In, nor was he with Alice the night of the break-in, as well, he hated the Blossom family for allegedly stealing the Cooper family legacy, and Polly being pregnant with Jason's child, which gave Hal motive. Alice laughed hysterically at the notion that Hal could be Jason Blossom's killer. She claimed he didn't have the stomach for it, though she wished he had done it, or that she had done it, as Jason deserved it after what he did to Polly. She then told Betty that she was beginning to sound just as crazy as Polly, and that she may not believe them when they said Polly was crazy, but she would obey them.
Following Polly's escape from the group home, Hal, Alice, Betty, and many other residents of Riverdale orchestrated a search party in an effort to find her. They began in Eversgreen Forest, and headed East since that's the direction Polly would have gone in if she wanted to leave town unnoticed. After a tense run-in with the Blossoms, Alice announced to the town that Polly was pregnant with Jason's child. The next morning, Hal and Alice were asked a number of questions by Betty, such as if Polly and the baby would be staying with them at the house. They assured Betty that Polly would be welcomed back home but lied to Betty and told her that Polly decided to give the child up for adoption. Hal stated that that was the only option available to her. However, Betty already knew that they weren't telling her the truth as she had secretly found Polly the night before and knew she wanted to keep her child. Since she couldn't return home, Betty made arrangements for Polly to stay at The Pembrooke with Veronica and Hermione Lodge.
After attending Polly's baby shower that the Lodge's and Betty had held, Alice confronted Hal over the appointment he had supposedly made for Polly behind Alice's back, so that she could fix her 'mistake', following the discovery her pregnancy. Hal confirmed to the angry Alice that he did make the appointment and that he didn't involve Alice because he knew she would've overreacted. He insisted that she was not ready and that neither was Polly. Alice wondered why sending Polly to the Sisters wasn't enough, to which Hal explained that Polly's life was being ruined by that mistake. When Alice demanded that Polly be allowed to move back into the house, Hal lost his temper and asserted that he would not raise a child with Blossom blood. Enraged that Hal will not accept Polly back into their family, Alice kicked him out of the Cooper household. Initially protesting, Hal turned around and left. 
They reunited when Alice arrived at The Riverdale Register with Betty where they presented him with a USB flash drive that contained a tell-all exposé of the corruption surrounding the Blossom family. Alice and Betty explained to Hal that they wanted to make the Blossoms answer for all the harm they caused, such as taking Polly, who was currently residing Thornhill. However, Hal refused to publish Alice's article as it would only serve her personal vendetta against the family. Having been bitter after getting kicked out of the house, Hal changed the login password for the Registers' computer so that Alice could not use it. He then fired Alice from the paper as retaliation for being kicked out of the house. Alice and Betty left, but before leaving, Alice was so enraged that Hal was foiling her efforts to get Polly back that she threw at rock at the shop's front door, shattering the glass, much to Hal's (and Betty's) shock.
After learning that Fred had been shot at Pop's shoppe by an unknown, black hooded assailant, Alice, Hal, and Betty rushed over to Riverdale General Hospital, where Fred was undergoing surgery. To no surprise, they are met by Jughead, Veronica, and Hermione. They entered the lobby to find Archie pacing back and forth, covered in his father's blood. As the kids embraced, Hal, Alice, and Hermione checked in with the nursing station. While Archie headed into the hallway to call his mother, and inform her of Fred's shooting, Alice accused the Southside Serpents of potentially being involved, and looked to Jughead for answers. In consideration of everything that was going on, Hal whispered to her that now was not the time.
Alice and Hal briefly appeared in one of Fred's dream-like hallucinations following the shooting. They sat together in the crowd at Archie and Veronica's Scottish themed wedding.
Fan Mail from the Black Hood
Alice and Hal greeted Betty as she returned home from school that evening. The envelope that Betty had brought in earlier that morning from the front porch was "fan mail" from the shooter, who was calling himself the Black Hood. He wanted them to publish his letter claiming responsibility for the shootings of Fred Andrews, Moose Mason, and Midge Klump, as well as the murder of Geraldine Grundy in Greendale. As proof that he is who he says he is and that the letter is from the actual killer, inside the envelope was Fred's missing wallet and Geraldine's glasses.
Alice and Hal then headed down to the Mayor's office, where they turned the evidence over to Mayor McCoy and Sheriff Keller. In the spirit of public safety, Mayor McCoy suggested that they refrain from publishing the letter. However, Hal and Alice felt it was their responsibility to inform the public that there was a killer freely walking about Riverdale, targeting his next victim. Printing such an article would cause town-wide panic, Sheriff Keller said. He requested a media black-out for at least the next twenty-four hours. He'd be taking the letter into evidence, but claimed that he would send them a copy afterwards. However, there was no need for such doing. Hal and Alice had made their own copy just before sending it to the printer for tomorrow's front page.
The next day, Alice and Hal were approached by Polly, who after reading their published article of the Black Hood's letter in the Register, decided that she would be leaving Riverdale for her own safety. She had already made arrangements at the Farm. What Farm, Alice wondered. Polly explained that she was referring to the very same Farm that she and Jason had planned to run off to before he was murdered. Hal suggested that Polly settle down, so that they can talk about what to do next. Polly was worried about her well being, as well as the well being of her unborn babies. With the killer targeting sinners, she was no longer safe in Riverdale considering that she was an unwed mother carrying her cousin's babies. Over Alice's dead body would she allow Polly to run off and give birth at a Farm, though she didn't have much say in the matter as Polly had already made up her mind. She stormed off, with Hal not far behind, hoping to talk some sense into her.
With the Black Hood free to terrorize the town and target the residents of Riverdale, Alice and Hal took precautions in order to ensure the safety of their family by installing brand new locks on the door.
Alice and Hal confronted Betty after learning that Poll had left town despite the fact that she had told her not to. They sat Betty down at the dinning room table because she had let Polly go without alerting her Alice. When Betty tried to justify her actions for helping her sister, Alice burst into tears, revealing how she was constantly terrified for her daughters' safety knowing there was a killer on the loose. Every time Betty walked out the door or didn't answer her phone when she called, Alice worried that something terrible had happened to her. It was the acts that she and Polly did in secrecy that made it difficult for their mother to protect them. They even label Alice as a monster for trying to protect them. This upset Alice to the point where she left the room, leaving Hal and Alice to cope with the revelation.
Two days had passed since their discussion with Betty, and so Alice and Hal attended the Town Hall meeting, where Mayor McCoy welcomed all to the event in hopes that she could address their concerns and if possible, ease their minds, as she too shared their desire to protect their town and their children. Mayor McCoy and Sheriff Keller then announced the introduction of a town-wide curfew and helpline that residents can call to report any suspicious activity. Alice likened the police department's actions to the Red Circle's plan and expressed that it had come time to solve the real problem of Riverdale; the Southside. Although Mayor McCoy tried to stop Alice's speech, focusing exclusively on the Black Hood, Alice snorted, continuing to feed and give voice to the indignation of a town; the reporter suggested closing the Southside High School, a drug spreading center, and also suggested increasing police patrols. Alice was opposed by Fred Andrews, who claimed that demonizing one another was counterproductive. Alice was about to reply when Betty and Jughead burst into the meeting, saying the Black Hood was headed to the Town Hall according to the message they deciphered. Alice had no time to reply before Betty had the meeting evacuated.
With the Town Hall meeting brought to an abrupt end, Hal, Alice, Betty, Jughead, Sheriff Keller, and Mayor McCoy reconvened at the Cooper's house, where they hoped to gain a better understand of how Betty and Jughead knew where the Black Hood would strike next. Betty handed them the letter, which was sent to her by the Black Hood, along with the cipher that she had earlier turned over to Alice, revealing that she had withheld evidence from them in an attempt to solve the cipher herself.
Secret Serpent Past
Alice entered Pop's for her usual meal. However, while there, she grew alarmed by Pop Tate's supportive words. She became even more concerned after noticing that all the customers were staring at her. Alice discovered that Betty had published on the front page of the Blue and Gold, a defamatory article about her arrest during her adolescence, titled "Alice Cooper's Secret Serpent Past". Upon returning home, Alice and Hal questioned Betty on how she found about the article since she had erased any trace from any public archive. Maybe it was one of the Southsiders you attack in your paper, daily, Betty replied. She constantly talked down on FP, Jughead, and the Serpents, despite previously being one herself. Alice suspected that Betty's publishing of the article was out of revenge, but as Betty explained, she did it in the name of justice and Alice's "holier-than-thou" attitude. Alice ripped the newspaper page, barely holding back her tears while staring back at her daughter before Betty left the kitchen.
A couple days later, Hal attended the Lodges' SoDale Gala Opening, where he became reacquainted with an old friend; Hiram Lodge. Just between the two, Hal told Hiram that the article Betty published of Alice's mugshot, took a toll on her, so they both decided it would be best if he covered the event alone. Much to Hal's surprise, Alice showed up at the SoDale Gala Opening, completely owning the scene in a fabulous red snake print dress and a golden snake-shaped necklace. Alice left the various attendants totally astonished, including her husband who had just finished saying to Hiram Lodge that wasn't a good idea for Alice to show up in public after the defamatory article. Later, Alice barely avoided appearing bored during Hiram's speech to his guest. 
Alice and Hal briefly appeared in Betty's anxiety induced nightmare along Polly. The three of them gathered in the living room by the fire place, as Betty came down the steps. They wished her a Merry Christmas. Moments later, Hal, Alice and Polly. In Betty's nightmare, they had been murdered by the Black Hood.
Alice and Hal learned from Betty that Polly gave birth to the twins at the Farm. As Hal tried to cope with the news, Alice struggled to hold back her tears. So Hal questioned why Polly hadn't informed them of this. Alice surmised that Polly didn't want them to be apart of the babies' lives. Alice then asked Betty if Polly was alright and if the children were healthy. Betty reassured her, stating that Polly is fine and the babies are healthy. Betty revealed that this wasn't all she had to share. After some digging, she found an address for Alice's son and her biological brother, that was given up for adoption many years ago. His name was Charles Smith. With Polly gone, Betty assumed that this would better their lives, but Hal would beg to differ. He scolded Betty for prying into something that had nothing to do with her or Polly. Betty exclaimed that she did it for her mother, though she was clearly upset by the recent revelation, Alice agreed with Hal, deciding then that it was best to end the conversation.
The following evening, Betty returned home with Chic hanging over her shoulder as Alice and Hal sat in the living room reading books. She called out to them for help as Chic's arm had been sliced open. Hal, Alice and Betty took Chic to the kitchen, where they grabbed the first aid kit and applied medical care.
Afterward, they laid him down in Polly's room to rest for the night. Hal stood by the doorway as Alice comforted Chic and explained that they had a lot to talk about.
As the Coopers sat at the breakfast table, Hal began an intrusive line of questioning of Chic, starting with how long he planned on staying with them. Alice stated that he was free to stay for as long as he wanted to. Hal claimed that he was simply trying to plan his life. When Betty brought Chic home, he was bleeding profusely from his arm. Hal wanted answers on why Chic was in that condition. Betty told Chic that he didn't have to answer her father's questions but he did so regardless. Chic's attacker's name was Marcel. He ran the Hostel, and sometimes, he booked clients for them. The night Betty showed up, Chic wasn't in the mood to work, but Marcel attempted to convince him otherwise. Both Hal and Betty both expressed interest in the type of clients Chic catered to. Chic replied that he had clients ranging from nice to even nastier than Marcel. If Hal preferred, Chic could specify, along with showing him a decent collection of scars that he had acquired over time. Betty also had scars, crescent marks in her palms, from digging her nails in them. Like Betty, Chic once dug his nails into the palms of his hands.
Two days had passed since their previous sit down at the breakfast table, though Hal had still not grown past his antagonizing of Chic. He asked if Chic knew that he was sitting in Polly's seat. He was not only sitting in her chair, but sleeping in her bed as well. Chic was filling a void, as far as Hal was concerned and it was the only reason Chic was staying with them. Alice and Betty urged him to stop though, Chic was surprisingly unbothered by Hal's remarks. Everyone needed something, to his point. Furthermore, he didn't expect to be staying with them for free. He never had.
On Pickens Day, Alice had prepared a hearty breakfast for the family in preparation for the celebration at Pickens Park, especially since it would be their first outing as a family. However, Hal would be staying behind as he had a few odd jobs around the house to catch up on.
Despite claiming that he was staying home to catch up on a few odd jobs around the house, Hal confronted Chic at Pickens Day. He asked if Alice knew what kind of person they had welcomed into their home, in the room next to Betty's no less. While they were gone, Hal went through Chic's computer. In doing so, he discovered what Chic had been doing online with his "clients". Betty insisted that he stop harassing him, though Chic wasn't the only subject of Hal's anger. He even scolded Betty for bringing Chic into their lives and into their home, more specifically, Polly's bedroom. Alice remarked that Polly was no longer apart of their lives and that therefore, it was no longer her room. Hal insisted that Chic had to go and that Alice knew exactly why. Alice reminded Hal that she had thrown him out the house before and that she would not hesitate to do it again. Heading the warning, Hal took off.
As Hal stood by the front door while holding a suitcase, Alice and Betty attempted to convince him to stay at the house but he was adamant in leaving for as long as Chic was staying with them. Though Alice wasn't willing to entertain his insane notion. She and Betty tried to explain to Hal that Chic wasn't hurting anyone and that he had found a job at the Bijou. He had even offered to pay them rent. So Alice had no idea what was Hal's beef with him. Hal replied that Chic was a stranger, though Hal wasn't even making an effort to get to know him. However, Hal refused to change his stance on the matter. Before leaving, he told Alice and Betty to call him once Chic was gone. In the meantime, he'd be at a ShareBNB down by the Register.
In the late hours of the night, Hal called Betty to tell her that he was on his way to the house for toiletries but he didn't wish to get into a fight with Alice about Chic. Upon his arrival, he was overwhelmed by the strong aroma of bleach. Alice supposedly spilled tomato soup on the rug and she didn't want it to stain. After remarking that it must've been a lot of soup given that the house smelled like a hospital, Hal headed upstairs to get the toiletries he had come for.
Heading towards Divorce
After a fight about Hal selling their newspaper to Hiram Lodge, Hal announced in front of Betty that he wanted a divorce. Alice gladly agreed to one however later she confronted him on his timing after learning that Hal along with their daughters were going inherit Blossoms' money and told him that half of his money was going be alimony payment for her.
Hal: "Alice here, she's been redecorating The Register. The other day, she threw a brick through the window."
Alice: "Keep talking, Hal, and the next brick I throw may not be at a window."