Both Vince Edwards and Martin Landau would go on to star in their own TV series in the 1960s. Mr. Edwards would go on to play the titular character in the medical drama Ben Casey (1961), and Mr. Landau would go on to be a member of the original cast in the TV spy thriller Mission: Impossible (1966).
This is the fourth of 20 appearances Frank Wilcox makes in this series, each time playing Federal DA Beecher Asbury. While still appearing in this series, he took on the recurring role of oilman John Brewster, a role he is perhaps best remembered for, in the hit TV sitcom The Beverly Hillbillies (1962).