Richard Diamond – Caspary Case. ep81, 510202

A security guard dressed in a dark uniform is reaching for his sidearm, which is holstered on his right hip. He stands in front of a brick wall, with his left hand resting on his belt. His facial expression suggests a state of high alertness and readiness to act in case of any threat or danger.
Security Guard Drawing his Weapon --- Image by © Royalty-Free/Corbis "Used with permission from Microsoft."

A woman comes to Richard for protection. She secretly witnessed her husband plotting to kill her, but there’s more to it than that. When Dick goes to investigate, he gets a thump on the head, and wakes as the prime suspect in a murder. It seems he didn’t protect his client very well, but the cops let him go to help uncover the real killer.

After surviving more thumps, and rough treatment, Dick gets away and turns to the night club scene. Will the torch singer in the club be able to help with answers? With the unintended help of a cute hat check girl, Dick puts an end to his bad guy.

Note: Arthur Q Brian is the police investigator. William Conrad is the business partner of the gambler, Caspary.