Victor Ragar, a cellist at a music conservatory that fronts for an Eastern Bloc freedom movement of which he is the leader, is in danger of being assassinated by a compatriot who accuses him of betraying the cause. The would-be assassin, Paul Delorio, also has a personal motive- Victor ran off with Paul's wife while Paul was in prison in the old country. The conservatory's director, also a member of the movement, hires Checkmate to protect Victor.
| Name | Type | Role | |
|---|---|---|---|
| Sy Salkowitz | Writer | ||
| Anthony Spinner | Writer | ||
| Audrey Swanson | Guest Star | ||
| John Alderman | Guest Star | ||
| Noah Keen | Guest Star | ||
| Jimmy Carter | Guest Star | ||
| Richard Conte | Guest Star | ||
| Signe Hasso | Guest Star | ||
| Werner Klemperer | Guest Star | ||
| Tom Gries | Director |