Escape from San Quentin

Johnny Desmond

Mike Gilbert

Richard Devon

Roy Gruber

Roy Engel

Hap

Ken Christy

Curly Gruber

William Bryant

Richie

Merry Anders

Robbie

Larry J. Blake

Hap's Lead Henchman

Paul Bryar

Mr. Lang

Don Devlin

Undetermined Role [IMDb name: "Piggy"]

Dean Fredericks

Hap's Henchman Jerry