USA
Don Corey and Jed Sills operate Checkmate, Inc., a very high priced detective agency in San Francisco. Helping them protect the lives of their clients is British criminologist (once an Oxford professor) Carl Hyatt. - IMDb
| Ajedrez fatal |  Spain |
| Ajedrez fatal |  Mexico |
| Checkmate |  Canada |
| Checkmate |  Ecuador |
| Checkmate | USA |
| Checkmate |  West Germany |
| Échec et mat |  France |
| Scacco matto |  Italy |
| チェックメイト |  Japan |
 |
Peter Lazer [15] | Cadet William Edgerton Gray (TV Episode: Tight as a Drum) (1961) |
 |
Warren Hsieh [11] | The First Boy (TV Episode: In a Foreign Quarter) (1962) |
 |
Dennis Rush [9] | Freighter Blaisden / Tommy Lako (TV Episode: Tight as a Drum) (1961) |
|
Philip Grayson [16] | Cadet Danny Slocum (TV Episode: Tight as a Drum) (1961) |
|
Jimmy Carter | Leo (TV Episode: An Assassin Arrives, Andante) (1962) |
