During a TV talk show presenting his memoirs former jewel thief Tony Neill plans to steal a diamond necklace unnoticed during a break. He succeeds, but kills the butler. Barnaby is hired by an insurance company to find jewelry and asks Neill for advice.
| Name | Type | Role | |
|---|---|---|---|
| Robert Hamner | Writer | ||
| Marie Windsor | Guest Star | ||
| Gary Owens | Guest Star | ||
| Michael Laurence | Guest Star | ||
| Robert H. Harris | Guest Star | ||
| Ben Wright | Guest Star | ||
| Peter Haskell | Guest Star | ||
| Charles Isen | Guest Star | ||
| Susanne Hildur | Guest Star | ||
| Bert Freed | Guest Star | ||
| Michael Caffey | Director |