Episode guide to the detective series centred around private investigators Don Corey and Jed Sills, who, assisted by Professor Dr. Carl Hyatt, run the Checkmate Detective Agency in San Francisco, aiming to prevent crime rather than investigate it.

Death Runs Wild

Interrupted Honeymoon

The Cyanide Touch

Lady on the Brink

Face in the Window

Runaway

Target: Tycoon

The Deadly Shadow

The Dark Divide

Moment of Truth

The Mask of Vengeance

The Murder Game

The Princess in the Tower

The Terror from the East

The Human Touch

Hour of Execution

Don't Believe a Word She Says

Laugh Till I Die

Between Two Guns