A criminologist whose speciality was the rehabilitation of parolees is killed and his research assistant assaulted, leaving St. John to piece through the man's work to find a suspect.
| Name | Type | Role | |
|---|---|---|---|
| Marc Singer | Guest Star | ||
| Michael D. Robert | Guest Star | ||
| Jean Allison | Guest Star | ||
| Luke Askew | Guest Star | Billy Donager | |
| Jim Borrelli | Guest Star | ||
| Martin Spear | Guest Star | ||
| Karen Anders | Guest Star |