Mannix tries to locate an heir, who is brought into danger by the attention.
| Name | Type | Role | |
|---|---|---|---|
| Don Brinkley | Writer | ||
| Oliver Crawford | Writer | ||
| Russ Conway | Guest Star | ||
| Al Roberts | Guest Star | ||
| Peter Whitney | Guest Star | ||
| Elizabeth Lane | Guest Star | ||
| Harry Swoger | Guest Star | ||
| Gil Perkins | Guest Star | ||
| Don Knight | Guest Star | ||
| Chuck Hicks | Guest Star | ||
| Karen Steele | Guest Star | ||
| Gerald Mayer | Director |