In the late 1970s two FBI agents expand criminal science by delving into the psychology of murder and getting uneasily close to all-too-real monsters.

1. Episode 1 60m In 1977, frustrated FBI hostage negotiator Holden Ford finds an unlikely ally in veteran agent Bill Tench and begins studying a new class of murderer.

2. Episode 2 56m Holden interviews the eerily articulate murderer Ed Kemper, but his research provokes negative feedback at the Bureau.

3. Episode 3 46m Dr. Wendy Carr joins Holden and Tench in their first success, when their insights lead to an arrest.

4. Episode 4 54m Bill and Holden consult with Dr. Wendy Carr to begin classifying their subjects. They receive surprising news.

5. Episode 5 42m Holden and Bill return to a perplexing case in Pennsylvania where a set of clues leading in multiple directions leaves no shortage of suspects.

6. Episode 6 35m Wendy considers an offer. Holden and Bill struggle to communicate the meaning of their findings to the judicial system in the baffling Altoona case.

7. Episode 7 53m 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.

8. Episode 8 54m Bill and Wendy interview candidates for a fourth member of the team. Holden is intrigued by complaints about a school principal's odd habit.

9. Episode 9 49m Holden's methods during a disturbing interview with mass murderer Richard Speck create dissension among the team and kick off an internal FBI probe.