Générique complet
Trapped by G-Men
Jack Holt
G-Man Martin Galloway, posing as Bill Donovan
Wynne Gibson
Alice Segar, posing as Mrs. Donovan
C. Henry Gordon
Kilgour
Jack La Rue
Fred Drake
Edward Brophy
Lefty
William Pawley
Harry Grady
Arthur Hohl
Henchman Blackie
Robert Emmett O'Connor
Federal Agent Jim
William Bakewell
Dick Withers
Eleanor Stewart
Nancy Higbee
Charles Lane
Fingers
Frank Darien
Dad Higbee
Lucien Prival
Franzy
Richard Tucker
Agency Chief Conover
George Cleveland
Miner
Wallis Clark
Federal Agent
Hal Taliaferro
Federal Agent
