Coincidentally or not, the lead male and female characters in this episode have the same first names as the guest stars playing them: Peter Breck plays Peter Warren, and Myrna Fahey plays Myrna Warren.
Kevin Hagen (investigator Jacob Leonard) appeared in six episodes of Peter Breck's series The Big Valley (1965).
In addition to "The Case of the Gambling Lady", Peter Breck appeared on Tombstone Territory (1957) in The Lady Gambler (1958).