A widow who runs a yacht club hires the Checkmate agency to investigate an apparent attempt on the life of a married man she is having an affair with, who happens to be a member of the club.
| Name | Type | Role | |
|---|---|---|---|
| Robert J. Shaw | Writer | ||
| Lucy Prentis | Guest Star | ||
| Wilton Graff | Guest Star | ||
| Paul Tripp | Guest Star | ||
| Stacy Graham | Guest Star | ||
| Steve Franken | Guest Star | ||
| George N. Neise | Guest Star | ||
| John Baragrey | Guest Star | ||
| Patricia Neal | Guest Star | ||
| John Astin | Guest Star | ||
| Alexander Singer | Director |