Burt Lancaster as Joe Collins

Hume Cronyn as Capt. Munsey

Charles Bickford as Gallagher

Yvonne De Carlo as Gina Ferrara

Ann Blyth as Ruth

Ella Raines as Cora Lister

Anita Colby as Flossie

Sam Levene as Louie Miller #7033

Jeff Corey as 'Freshman' Stack

John Hoyt as Spencer

Jack Overman as Kid Coy

Roman Bohnen as Warden A.J. Barnes

Sir Lancelot as Calypso

Vince Barnett as Muggsy

Jay C. Flippen as Hodges (guard)

Richard Gaines as McCollum

Frank Puglia as Ferrara

James Bell as Crenshaw

Howard Duff as Robert 'Soldier' Becker

Art Smith as Dr. Walters

Whit Bissell as Tom Lister

James O'Rear as Wilson

Paul Bryar as Harry (uncredited)

Gino Corrado as Italian Father Visiting Prison (uncredited)

Al Ferguson as Guard (uncredited)

Jack Gordon as Convict (uncredited)

John Harmon as Roberts (uncredited)

Herbert Heywood as Chef (uncredited)

Tom Steele as Tom - Tower Guard (uncredited)

Ray Teal as Jackson - Guard (uncredited)

Dale Van Sickel as Guard in Machine Shop (uncredited)

Rudy Germane as Convict (uncredited)