Scott Lincoln

The BAU team face one of their toughest cases yet ,when a prolific, border-crossing serial killer leads them on a hunt into Canada.

Earl decides to quit smoking and soon discovers it's harder than he anticipated; Joey comes to a conclusion on the best way to inherit Earl's money.

Alison deals with her mother's death; Hanna and Aria attempt to tie up loose ends with Ezra and Mona, who know the truth about Alison's story; Spencer and Emily probe Jason's past whereabouts.

Past events haunt Aria while Emily, Spenser and Hanna try to adjust to the new normal; Alison has suspicions about her family; Kenneth searches for Jessica; Jason's odd behaviour raises eyebrows.

Phoebe helps the ghost of a student who was killed to prevent the publication of her thesis on evil; the Goo Goo Dolls perform at Piper's nightclub.

Sue comes up with a new cheerleading stunt, and Schuester and Beiste force the football team and the male Glee Club members to work together.