Gangsters free one of their colleagues being escorted to prison and kill several FBI agents and local police officers in the attempt. FBI agent Melvin Purvis puts together a special squad to track down and capture the men responsible.
Dale Robertson
as Melvin Purvis
Bo Hopkins
as Charles Arthur 'Pretty Boy' Floyd
Scott Brady
as Police Commissioner Herbert Tucker McElwaine
Matt Clark
as Verne Miller
John Karlen
as Sam Cowley
Lynn Loring
as Vi Morland
Robert Walden
as Adam Richette
Elliott Street
as Lester Gillis 'Baby Face' Nelson
Mills Watson
as Frank 'Jelly' Nash
Harris Yulin
as John Lazia
Philip Bruns
as Capt. Jackson
William Jordan
as John Dillinger
