After reporter Pat Allen is killed at the Daily Sentinel by a leopard, Britt Reid finds a transmitter in a cigarette box. Later, D.A. Scanlon informs Britt of the discovery of a perfect diamond on Allen's desk. Digging around, Reid discovers that the gemologist had been working on producing synthetic diamonds.
| Name | Type | Role | |
|---|---|---|---|
| Lewis Reed | Writer | Story | |
| Jerry Thomas | Writer | Teleplay | |
| Richard Bluel | Producer | Producer | |
| Jerry Thomas | Producer | Associate Producer | |
| John Alvar | Guest Star | Mark | |
| Signe Hasso | Guest Star | Yolanda deLukens | |
| Sheila Leighton | Guest Star | Secretary | |
| Richard H. Cutting | Guest Star | Professor Miller | |
| Don Eitner | Guest Star | Pat Allen | |
| Norman Leavitt | Guest Star | Walter Melvin | |
| William Dozier | Executive Producer | Executive Producer | |
| Larry Peerce | Director |