|Last Appearance||Thanks For The Memories|
|Relationships|| James Cogan (Husband), Sarah Vernon (Biological MIL), Nathan Wuornos (Biological FIL) June Cogan (adoptive MIL), Paul Cogan (adoptive FIL)†|
|Appeared In|| 11 Episodes;|
6 as Tommy Bowen
2 as Claire Callahan
2 played by Vandervoort
Arla married James Cogan in early 1983. Soon after their marriage the Cogans left Nederland, Colorado and travelled to Haven, Maine in search of James' biological mother, Sarah Vernon. In Vernon's stead they found Lucy Ripley, who had just discovered that she had to leave Haven with the Hunter Meteor Storm. Ripley and her son worked together on Troubled cases and the two grew quite close. But less than two weeks later, Arla lost her new husband when James was killed at Edgewater Beach by a man with the Maze tattoo.[note 1]
When James died, a mysterious amnesia fell over Haven and no-one seemed to remember the events of the day or even James Cogan's name. After that point, James was known to Haven only as the Colorado Kid. It is unknown is Arla was affected by this amnesia, but she remembered her husband. James' death triggered Arla's Trouble and strips of her skin fell off, until she was completely skinless, a "raw, oozing thing". She killed and young woman and used the Teagues' fishing shack to skin her, something she said she did on pure instinct. According to Cogan, Ripley, who'd brought James into The Barn promised to bring her too, but reneged and left her in Haven when she discovered that Cogan had killed. Ripley left in the Barn with the Hunter and Cogan went to The Guard demanding that they bring back the Barn.
The Bolt-Gun KillerEdit
When the Troubles returned, Cogan's trouble reactivated. She used her ability as a skinwalker to get close to the mysterious woman's new identity and find out where her husband was. She also started killing women with features similar to her own, creating a custom skin so that she'd look like herself for James.
Cogan attacked Audrey Parker in her apartment, tasering her and staging a struggle. She left behind a whistler she had stolen from Duke Crocker in order to trick Nathan Wuornos into attacking Crocker. She brought Parker to the Altair Bay Inn, and held her in the basement, interrogating her about the Colorado Kid. When her interrogation of Parker didn't get anywhere, Cogan killed Roslyn Toomey, owner of the Altair Bay Inn and wore her skin, pretending to be another victim of the kidnapper. Cogan alternated between interrogating Parker about the Colorado Kid as the kidnapper and commiserating with her as Toomey. As Toomey she gave Parker information about the Colorado Kid, mentioning that he'd stayed at the Inn in 1983, possibly hoping to trigger a memory. Cogan burned Toomey's body to hide that she'd skinned her.[note 3]
Parker escaped Cogan, and helped Wuornos and Crocker deal with Wesley Toomey, who's Trouble had been triggered by his mother's kidnapping. The next day Parker exhumed the Colorado Kid's grave, trying to confirm whether the information she'd gotten from her abductor about his not being dead was accurate. Parker found the grave filled with bricks, not a body and a message she'd left for herself when she was Lucy Ripley: "Find him before The Hunter." Cogan spied on the exhumation, watching from a nearby building with binoculars.
Cogan then killed PFC Grady Moore, a member of The Guard. She wore his skin when she murdered two women and cut off their body parts for her skin suit. She attacked one woman in front of an ATM, making sure that Moore's tattoo was seen by the security cameras. Cogan's signature method of killing, a bolt-gun, used to kill quickly while leaving the skin intact, got her the name "The Bolt-Gun Killer". Cogan broke into the Haven Herald and took items from a locked box in the back room. Cogan also took and copied a key to the Teagues' fishing shack, which she'd used 27 years ago to skin her first kill.[note 4] As Grady, Cogan murdered visiting Detective Tommy Bowen and took his skin. As Bowen she took a job offer that Chief Wuornos had made to him, securing a position working closely with Wuornos and Parker.
Cogan got an opportunity to work with Parker and Wuornos when she was trapped with them in the Holloway house. When Parker attempted to trigger her memories from her time as Lucy Ripley, Cogan assisted her. The memories that Parker recovered not only helped free them from the Holloway house but helped her identify the Colorado Kid as James Cogan. Parker travelled to Colorado to try and find Cogan's relatives, leaving Cogan-as-Bowen to partner with Wuornos. When Wuornos and Bowen shared a car, Wuornos saw the saved addresses and realised that Bowen had been at Kitchener Mill, where Grady Moore had last been seen. Suspicious, he pressed and found a Cogan's bolt-gun in the trunk of the car. Wuornos confronted Cogan-as-Bowen and Cogan shot and killed him, then shot after Noelle, who had witnessed the murder.
Before Cogan could finish Noelle off, Parker and Duke Crocker arrived on the scene, having just returned from Colorado. Cogan-as-Bowen told Parker and Crocker that Noelle had killed Wuornos and managed to get to Noelle first and kill her without being caught. Parker pursued Moira, hoping that Noelle's sister would have the same resurrection Trouble she did and that she'd be able to save Wuornos. Moira had seen Cogan-as-Bowen kill Wuornos and told Parker. Parker warned Crocker that Bowen was the Blot-Gun Killer and asked him to watch him until Wuornos was resurrected but Crocker tipped his hand and Crocker and Cogan-as-Bowen got into a fight. Crocker got Cogan's blood on his hand and it activated his Trouble, letting him know that s/he was Troubled. Before Cogan-as-Bowen could kill Crocker, Jordan McKee arrived and used her Trouble on Bowen.
Cogan-as-Bowen barely managed to escape and left for the Teagues fishing shack. There she found the Teagues, who had discovered that their fishing shack key had been copied, poking around. She tied them up and interrogated them for hours about the Colorado Kid and the Barn. She was still interrogating them she Parker and the resurrected Wuornos arrived at the fishing shack the next morning. Cogan-as-Bowen escaped on a motorboat, but Parker and Wuornos shot after her and the boat exploded. Somehow Cogan escaped the burning boat unseen.
Shortly after this, Cogan murdered Claire Callahan, an HPD psychiatrist and Parker's close friend. Callahan had taken extensive notes on her sessions with Parker and Cogan used this to help her pass as Callahan. Cogan was wearing Callahan's skin when Parker and Wuornos discovered her the abandoned factory she was using to store her skin, and Callahan's notes helped her pass Parker's identity test. Cogan's cover as Callahan was blown a few days later when she was working with Parker on the Bolt-Gun Killer case. 
The Hunter Meteor StormEdit
The day before the Hunter Meteor Storm Cogan changed into the special patchwork skin she'd made to look like her old self and visited Duke Crocker to try and convince him to that Parker had to go into the Barn. She then got held up at gunpoint by the Teagues, who tied her up and questioned her just as she had done to them only a week earlier. She explained that she wanted to be there when Parker found the Barn, and she told Vince that there was another way to end the Troubles, one that he already knew. When Dave heard this he knocked Vince out and agreed to free Cogan if she told him what this other way was. Cogan spent the rest of the day shadowing Parker to make sure that she went to the Barn. When Parker was almost killed by Robert Taylor, the Troubled person she was trying to help, Cogan shot him and fled, saving Parker's life.
That evening, as the Hunter Meteor Storm started, Cogan waited for Parker at her apartment above The Grey Gull. When she got home, Cogan held her at gunpoint and told her what had happened when James had died: how Lucy Ripley had taken him to the Barn, how she'd promised to take Arla, how her Trouble had activated and how Ripley left her behind. Cogan told Parker that there was another way to end the Troubles, and end them permanently and that she'd tell her how once Parker brought her to the Barn and her husband. At gunpoint, Parker stole the motorboat that Crocker kept at The Grey Gull and took Cogan to Kick'em Jenny Neck, the place that the Barn had come for the real Audrey Parker. At Kick'em Jenny Neck, Agent Howard, told Cogan that he'd left James at Haven Joe's Bakery and gave her a cell phone to call him. She left Parker with Howard, and went to find her husband.
Cogan was briefly reunited with her husband and she told him that his mother had been the one to kill him. James began to get very sick, rapidly fading away and Crocker used this, calling her and offering to bring her and James to her Barn so that he could be healed again. At the Barn, Crocker turned on Cogan and held her at gunpoint while James, Parker and Nathan Wuornos entered the Barn. Inside the Barn James refused to speak to his parents until he saw his wife, so Parker left the Barn and brought her inside. Cogan was unaware that Troubles didn't work inside the Barn, and that when she entered, her skin would showed the signs of being sown together. Heartbroken and disgusted, James spurned Arla and in a murderous rage, she attempted to kill Parker. James stepped in to protect his mother and Arla's knife found him instead. Blaming Parker for this, for her losing her husband yet again, Arla attempted to stab her mother-in-law once more but lost a brief struggle that led to her death. Wuornos picked up Arla's dead body and placed her outside the Barn so that the regenerative energy of the Barn would not bring her back to life as it had James.
When Wuornos shot Howard and the Barn imploded, Arla's body was sucked inside. Her fate, and the fate of her husband are unknown, but they are presumed dead.
- "301" - as faceless abductor and Roslyn Toomey
- "The Farmer" - as Grady Moore and Tommy Bowen
- "Over My Head" - as Tommy Bowen
- "Double Jeopardy" - as Tommy Bowen
- "Real Estate" - as Tommy Bowen
- "Magic Hour (Part 1)" - photograph; as Tommy Bowen
- "Magic Hour (Part 2)" - as Tommy Bowen
- "Burned" - as Claire Callahan
- "Last Goodbyes" - as Claire Callahan
- "Reunion" - as Claire Callahan; with patchwork skin
- "Thanks For The Memories" - with patchwork skin
- ↑ This dates comes from the missing persons flyer in "Real Estate" and the Haven Herald reporting the Colorado Kid's death.
- ↑ Cogan's base of operations may by Kitchener Mill, where she interrupted a meet between Grady Moore and Ray.
- ↑ Cogan seems to have slipped in and out of Toomey's skin, as when she interrogated Parker she was quite tall and had a very low voice. How exactly this is possible and who's skin she might have been wearing is unknown.
- ↑ It's not known who's skin Cogan was wearing at the time she broke into the Herald, but Grady Moore is a likely guess. It matches the timeline and as a member of the Guard, Moore could likely enter the Herald without raising too much suspicion if caught.
- ↑ 1.0 1.1 "Magic Hour: Part 1"
- ↑ 2.0 2.1 "Thanks For The Memories"
- ↑ 3.0 3.1 3.2 3.3 "Real Estate"
- ↑ 4.0 4.1 "The Hand You're Dealt"
- ↑ Haven Herald/Vol. 68, No. 32
- ↑ 6.0 6.1 6.2 6.3 "Reunion"
- ↑ 7.0 7.1 7.2 "Burned"
- ↑ 8.0 8.1 8.2 "301"
- ↑ 9.0 9.1 "Double Jeopardy"
- ↑ "Stay"
- ↑ "The Farmer"
- ↑ 12.0 12.1 "Magic Hour: Part 2"
- ↑ "Last Goodbyes"