Emmett L. Coughlin, played by P.J. Brown, is a recurring character in the third season and debuts in the episode "Bone for Tuna". He is a Prohibition Agent working in Chicago, Illinois. He lives in nearby Cicero, Illinois. He leads a raid on Herkemeyer's speakeasy. He is killed by Nelson Van Alden because Van Alden fears he will expose him as a fugitive.
Fugitive former agent Nelson Van Alden is among the customers at Herkemeyer's when it is raided. He fears recognition as a fugitive, as he is posing as a salesman named George Mueller. Coughlin has no idea of his true identity, but knows his face as a neighbor and salesman. He lets him go after extorting a bribe. He is killed when he shows up at Van Alden's house to complain about an iron he bought, Van Alden mistaking the purpose of his visit. ("Bone for Tuna")
- Nelson Van Alden: Volstead Act violator, murderer (deceased)
|Season three appearances|
|"Resolution"||"Spaghetti and Coffee"||"Bone for Tuna"||"Blue Bell Boy"|
|"You'd Be Surprised"||"Ging Gang Goolie"||"Sunday Best"||"The Pony"|
|"The Milkmaid's Lot"||"A Man, A Plan..."||"Two Imposters"||"Margate Sands"|