Blake Bertrand

On the advice of a colleague, Barney puts together an extensive pre-nuptial agreement that lays out the rules for behaviour within marriage, as well as the terms for divorce.

The BAU team investigates the abductions of young children with troubled mothers in St Louis. Rossi reconnects with his first wife, who has shocking news for him.

After reconnecting with Kate, Walden becomes convinced she is the one for him, until he meets a woman named Vivian.

Amelia's drug addiction accelerates as she begins writing herself prescriptions and skipping work; Jake and Addison face an impossible choice; Violet returns to work; Erica is irritated when Charlotte and Cooper bond with Mason.

A patient confesses dark secrets to his family and community, compromising his chances of receiving life-saving medical treatment; Chase and Taub rejoin the team; Taub struggles to balance work and fatherhood.

Martin tracks down a man Jake led him to, and discovers he was Dr Teller's first patient and is now on death row.