Checkmate is hired to protect rodeo star Len Kobalsky from his girlfriend Marcy Lowell's brother, who disapproves of their relationship and prefers she marry someone from a wealthy family such as theirs. As it turns out, the real threat to Len is from one of his fellow rodeo riders.
| Name | Type | Role | |
|---|---|---|---|
| Dick Nelson (I) | Writer | ||
| Harold Jack Bloom | Writer | ||
| Suzanne Lloyd | Guest Star | ||
| Roy Engel | Guest Star | ||
| David Janssen | Guest Star | ||
| Ed Peck | Guest Star | ||
| Robert Colbert | Guest Star | ||
| Don 'Red' Barry | Guest Star | ||
| Tom Reese | Guest Star | ||
| Ben Wright | Guest Star | ||
| Roy Jenson | Guest Star | ||
| Charles Macaulay | Guest Star | ||
| Byron Paul | Director |