The checkmate team is being held hostage by a gang led by rogue gangster Joe Farrell, who is running from the mob. He demands that Don act as courier for his estranged wife and a fortune in stolen cash, or Jed and Dr. Hyatt will die. When Don discovers that one of Farrell's men plans to double-cross Farrell, Don tries to take advantage of the situation by pitting the two men against each other.
| Name | Type | Role | |
|---|---|---|---|
| Harold Clements | Writer | ||
| George D. Wallace | Guest Star | Frankie | |
| Jack Warden | Guest Star | ||
| Beverly Garland | Guest Star | ||
| George Keymas | Guest Star | ||
| Donald Randolph | Guest Star | ||
| Steve Peck | Guest Star | ||
| Ed Nelson | Guest Star | ||
| Bern Hoffman | Guest Star | ||
| John English | Director |