With an increase in the robbing and stabbing murders of miners, Hollister has to find those responsible. A stolen black diamond provides a clue.
| Name | Type | Role | |
|---|---|---|---|
| Melvin Levy | Writer | ||
| Jean Willes | Guest Star | ||
| Bobby Hall | Guest Star | ||
| Burt Mustin | Guest Star | ||
| Frank Kreig | Guest Star | ||
| Pierre Watkin | Guest Star | ||
| John Moloney | Guest Star | ||
| Robert Swan | Guest Star | ||
| Lee Roberts | Guest Star | ||
| William Conrad | Director |