Chicago February 14th 1929. Al Capone finally establishes himself as the city's boss of organised crime. In a north-side garage his hoods, dressed as policemen, surprise and mow down with machine-guns the key members of Bugs Moran's rival gang. The film traces the history of the incident, and the lives affected and in some cases ended by it.
Jason Robards
as Al Capone
George Segal
as Peter Gusenberg
Ralph Meeker
as George Clarence 'Bugs' Moran
Jean Hale
as Myrtle
Clint Ritchie
as Jack McGurn
Frank Silvera
as Nick Sorello
Joseph Campanella
as Albert Wienshank
Richard Bakalyan
as John Scalise
David Canary
as Frank Gusenberg
Bruce Dern
as Johnny May
Harold J. Stone
as Frank Nitti
Kurt Kreuger
as James Clark