Will and Hannah clash over a patient in need of a kidney transplant. Crockett is faced with a tough decision when Blake is in surgery.

When Gen-Z influencer Nate Lang is killed at a wild house party, CSI steps in. Upon examining the body, we learn that our killer left behind the username @ChrisSolves on our victim's forehead in invisible ink.

Alex is trying to get her life back to normal with Charlie and at Hope Zee – but with Charlie’s head in the clouds and the pressure to find her medical niche – she’s struggling. Inspiration comes in the form of an immigrant doctor who needs Alex to save his wife’s life and in return, helps her find her calling.

A bizarre trail of violence is traced back to a man who seems to have spawned an identical copy of himself – but one that’s only his darkest, most dangerous side, and it’s on a mission.

With Josh trapped inside his wolf, Nora and Aidan struggle to contain him, while Sally finds herself imprisoned in a mysterious place with Donna, where she learns the two of them share a magical power that comes at a price.

Team One confronts a man desperate to keep the promise he made to his deaf nephew by protecting the only place the boy has ever felt safe.

After an accidental encounter with someone from her past, Sally flees to Donna to try and make things right. Josh struggles with “raising” Erin. Kenny spurs Aidan’s memories of when Bishop first made him.

Liam tries to pit Josh and Nora against Aidan, Sally gets closer with Max at the funeral home, and Kenny suspects that Aidan may be a vampire.

Sally reaches out to Aidan as his struggle to survive becomes direr. Josh and Erin accompany Nora when she visits her family. Josh helps Aidan locate untainted blood.

Josh reconnects with Emily while he and Nora care for Erin. Aidan's clean blood supply is jeopardized when a sexy vampire makes Kenny an offer he can’t refuse. Sally gets in touch with a friend from her past who’s changed drastically since their last meeting.

Aidan remembers his wife as he gets sicker. Sally struggles with a hunger that she hasn't felt before. Josh and Nora meet an older wolf as Josh deals with his changing circumstances.

Josh and Nora face Liam for the final time, Sally deals with the consequences of her showdown with Donna, and Aidan must deal with Kenny now that he’s turned into an abomination.

Aidan learns there's a new vampire boss in town with ties closer to him than he'd like to admit. Josh's new life proves problematic when he tries to return to his old one, and Sally's newly acquired powers send her to a strange place in time where something horrifying appears to have happened to a mysterious little girl.

Josh and Nora's search for Donna continues while Sally further deteriorates, and Aidan breaks Kenny out of the hospital to enjoy his final days as a human.

Sally prepares to battle Donna, Josh and Nora get ready for their wedding, and Aidan juggles his relationship with Kat while preparing for Kenny’s “re-birth”.

Sally goes to Donna for help with her latest loss and learns more than she bargained for. Aidan and Suzanna come face to face with the truth about their tumultuous past, and Josh and Nora seek help from an old friend in an attempt to bring Josh back to who he was.

Aidan and Kat's human relationship continues to grow more serious, even though he's finding himself caught up in his vampire relationships. Josh and Nora meet a couple who reminds them of a future they might one day have. Sally enlists the help of an old friend to try and solve the mystery of the girl she calls "Lil' Smokie."

Josh struggles to get Nora back in his good graces, and finds himself sucked deeper in to the world of wolves whether he likes it or not, while Aidan and Sally find their bond as friends turning into something more, even though his relationship with Suzanna has taken a new turn.

Aidan, struggling with the most recent death in his life, helps Kenny with the idea of getting out of town. Sally and Nora help Josh conquer his wolf, while also dealing with both the new pack, and the dead little girl who’s been on Sally’s mind for the past few months.

As moving day finally arrives, the roommates discover they aren’t the only ones struggling with leaving the house, and a once-looming threat takes center stage, bringing with it a trail of death and destruction that no one is safe from.