Kevin Tighe took time off from playing Roy DeSoto on the NBC drama Emergency! to appear in this episode.
Edward Albert is the son of actor Eddie Albert of Green Acres fame.
Stuart Whitman had previously starred as Marshal Jim Crown on Cimarron Strip.
Inspector Queen: (about Murphy) Now there's a man who wants to be governor in the worst way.
Caesar: How do I look?
Inspector Queen: Like a man in a false moustache.
Velie: Listen, Caesar, I gotta guard you but I don't have to listen to any of your guff.
Caesar: What if I want some fresh air?
Inspector Queen: If you open a window remember that first breath may be your last.
Murphy: This had better be the most thorough murder investigation ever conducted by the homicide bureau.
Inspector Queen: They're all thorough!
Ellery: How'd he look when you found him?
Inspector Queen: Dead.
Velie: Inspector, I think we got a break.
Inspector Queen: We could use one.
Ellery: The Commissioner's your age. Nobody's saying he's over the hill.
Inspector Queen: He's not on the firing line.
Franks: (to Ellery) Readin' about murder--that helps me relax.
Murphy: Is this a deliberate attempt to compromise my position? Inviting me in the same room as this gangster.
Franks: It ain't gonna help my reputation much either.