As we all well know The Untouchables episodes were like the old B westerns where all kinds of personalities of the old West got involved with people that they never met. Eliot Ness and his elite squad never got involved with the legendary gangsters and outlaws of areas other than Chicago. But in the series they were an omnipresent law enforcement group covering the country.
In this episode they were concerned with a couple guys known for not having a lot of self control. Lawrence Dobkin plays Dutch Schultz and he would meet a grisly end later on when he would not get in line with the national crime syndicate. But Schultz was a model of decorum next to Vincent 'Mad Dog' Coll. This guy was so named 'Mad Dog' by Schultz when he worked for him and Schultz cut him loose because he was such a loose cannon. After that Coll becomes obsessed with hurting the Dutchman.
Clu Gulagher was an actor who always played many bug eyed loose cannons very well. His portrait of Mad Dog Coll here is something of a dress rehearsal for the part he did next to Lee Marvin in The Killers. Gulagher is so good in the part, you wonder how the two guys who do work with him can stand it.
The episode is in two halves, one where Robert Stack try to rescue an associate of Schultz's who call is holding for ransom. When that scheme fails, Coll first kidnaps a horse that Schultz is known to have placed a hundred grand bet on for the Kentucky Derby.
Gulagher is at his bug eyed best in The Untouchables.