Josh is miserable after his latest full moon transformation resulted in him waking up next to a bloody dead deer in the woods. Aidan suggests that he and Josh should live together so they can watch out for each other. When they've found the perfect apartment, they realise the place comes with its own ghost, Sally

Sally begs the guys to call Danny over so she can try to make him see her presence somehow. Aidan, while trying to fight off Cara's unwanted admiration, receives some shocking news about someone who he thought was dead. Josh discovers Aidan's involvement in the Rebecca incident and confronts him about it; at the same time, Josh is also struggling with whether to tell his sister the truth about himself.

Sally meets a ghostly new friend who teaches her how to cross physical boundaries like the apartment. Josh gets roped into the Neighborhood Watch against his wishes. Aidan is recognised by the son of one of his past victims, who is determined to confront Aidan about his father's murder.

Josh meets a werewolf who teaches him how to accept the change and is more than meets the eye. Aidan begins a dangerous relationship with an acquaintance. Sally learns that she needs to stop interfering in the lives of those she left behind.

Aidan has his hands full with a problem created at Bishop’s request. Sally remembers the details that led to her death. Josh learns the truth about the night that led to his change.

Aidan receives a “video postcard” from an old friend. Sally takes Aidan up on his offer to “take care of her problem.” Josh’s sister moves in with them which causes problems for the roommates. Josh goes on a date with a nurse from the hospital.

Josh has an odd and interesting homecoming. Sally attempts to protect Bridget from Danny but fails. Aidan deals with the aftermath of Marcus' attack.

Rebecca walks out on Aidan; Josh has romantic troubles; Marcus is worried that Bishop suspects he is a traitor and Sally faces off with an exorcist.

After his break from the Family, Aidan is afraid that Bishop will try to hurt him and his friends. At the hospital, he encounters a former lover, who has come to the hospital to die. Josh runs into Nora, and is afraid about possible complications in her pregnancy. Meanwhile, Sally finally finds a way to hurt Danny.

Nora finds out the truth about Josh; Sally misses her "door", but gains new powers; Aidan has a final showdown with Bishop, with surprising results. We also see how Aidan and Josh first met.

Sally finds out who has been haunting her; Josh tries to reunite with Nora.

Aidan tries to save Henry's life; Sally learns more about the reaper; old friends visit Josh.

Sally tries to convince Zoe not to turn her back on her gift; Josh is not sure if he should tell Julia the truth about himself; Aidan tries to make a life with Suren.

Aidan learns there's a new vampire boss in town; Josh's new life proves problematic; Sally's newly acquired powers send her to a strange place.

Josh wakes up to a surprising discovery; Aidan reconnects with Suzanna and remembers the life he once had; someone from Sally's past resurfaces.

Sally goes to Donna for help; Aidan and Suzanna come face to face with the truth about their past; Josh and Nora seek help from an old friend.

Sally learns that by changing the past to match the present, she has changed her and the roommates' futures.