Checkmate comes to the aid of a woman with a traumatic past when it becomes evident that someone is trying to make it appear she's mentally unstable. discrediting her eye-witness testimony at a murder trial.
| Name | Type | Role | |
|---|---|---|---|
| Joel Murcott | Writer | ||
| Howard Browne | Writer | ||
| Jane Wyman | Guest Star | ||
| Ken Lynch | Guest Star | ||
| Wilton Graff | Guest Star | ||
| Robert Osterloh | Guest Star | ||
| Henry Rowland | Guest Star | ||
| Olan Soule | Guest Star | ||
| Robert Carricart | Guest Star | ||
| Arthur Franz | Guest Star | ||
| Mary Tyler Moore | Guest Star | ||
| Frank Arrigo | Director |