| Guest Stars |
| •Arthur Hill | played | Max Griswold | Recurring (third appearance) |
| •Dabbs Greer | played | Doyle | Recurring (third appearance) |
| •David Macklin | played | Bob Griswold | Recurring (third appearance) |
| •Don Gordon | played | Claude Flood | Recurring (first appearance) |
| •Leonard Stone | played | Harry Palmer | Recurring (first appearance) |
| •Louise Latham | played | Barbara Griswold | Recurring (third appearance) |
| •Phyllis Love | played | Connie Parr | Recurring (second appearance) |
| •Robert Hogan | played | Lloyd Mitchell | Recurring (third appearance) |
| •Robert Knapp | played | Agent Noel McDonald | Recurring (third appearance) |
| •William Windom | played | David Roger Spiers | Recurring (second appearance) |
