Dr. Wendy Carr joins Holden and Tench in their first success, when their insights lead to an arrest.

Bill and Holden consult with Dr. Wendy Carr to begin classifying their subjects. They receive surprising news.

Holden and Bill return to a perplexing case in Pennsylvania where a set of clues leading in multiple directions leaves no shortage of suspects.

Wendy considers an offer. Holden and Bill struggle to communicate the meaning of their findings to the judicial system in the baffling Altoona case.

Wendy takes a career risk to relocate and join the team full time. Holden and Bill find it harder to keep the emotional intensity of work at bay.

Bill and Wendy interview candidates for a fourth member of the team. Holden is intrigued by complaints about a school principal's odd habit.

Amid sweeping changes at the BSU, Holden deals with severe repercussions from his close encounter with Ed Kemper.

To glean insight into the elusive BTK killer, Bill and Holden interview the Son of Sam, who makes a startling admission.

Bill gets drawn into a horrifying crime that hits close to home. Holden receives an intriguing offer while in Atlanta to interview a pair of killers.

Holden develops a controversial profile in the Atlanta slayings. Wendy conducts her first interview and finds being on the front lines suits her well.

Bill's devastating family situation spills over during his interview with Holden's holy-grail subject: Charles Manson. Wendy's new romance heats up.