Whitney Thorne is an oil magnate who is being targeted by an ex-partner. His daughter hires the Checkmate agency to help prevent his murder, but Thorne wants a showdown with his nemesis.
| Name | Type | Role | |
|---|---|---|---|
| Robert Libott | Writer | ||
| Jonathan Latimer | Writer | ||
| Robert J. Wilke | Guest Star | ||
| Charles Bickford | Guest Star | ||
| John Lupton | Guest Star | ||
| Madlyn Rhue | Guest Star | ||
| George Mitchell | Guest Star | ||
| John Hubbard | Guest Star | ||
| Frank Arrigo | Director |