The real moll of Legs Diamond was Marion "Kiki" Roberts. Her real name was Marion Strasmick, a former Ziegfeld Follies girl.
This is the third of three appearances Lawrence Dobkin makes in the series, each time playing Dutch Schultz. The other two appearances occur in Vincent 'Mad Dog' Coll (1959) and The Dutch Schultz Story (1959).
This is the third and final appearance Raymond Bailey makes in the series. As in the first two appearances, here he also plays Federal DA John Carvell. The first two appearances occur in Portrait of a Thief (1960) and The Underworld Bank (1960).
This is the second of three appearances Norma Crane makes in the series. She plays a different character in each appearance. In this role as Leg Diamond's wife Alice Diamond she is tenuously connected to the character Lily Dallas, the role she plays in The Lily Dallas Story (1961), by virtue of the association that Lily Dallas in that later episode has as a Legs Diamond erstwhile girlfriend.
This is the first of eight appearances Oscar Beregi Jr. makes in the series, playing here the role of Oscar Benjamin. In all his subsequent appearances, he plays the role of Joe Kulak.