Private eye Frank Cabot blackmails unfaithful husband Arnold Moore for whose wife he works. During a quarrel Moore falls from a roof top. Barnaby has to match wits with his criminal colleague, who already has another victim and is assisted by a pretty secretary.
| Name | Type | Role | |
|---|---|---|---|
| Larry Brody | Writer | ||
| William Sargent | Guest Star | ||
| Cheryl Miller | Guest Star | ||
| Priscilla Pointer | Guest Star | ||
| Robert Patten | Guest Star | ||
| Hank Brandt | Guest Star | ||
| Stuart Nisbet | Guest Star | ||
| Patrick O'Neal | Guest Star | ||
| Tony Monaco | Guest Star | ||
| Joan Van Ark | Guest Star | ||
| Charles Aidman | Guest Star | ||
| Walter Grauman | Director |