James Mason as Dr. Frank Matson

Märta Torén as Laura Thorsen

Dan Duryea as John Wheeler

Basil Ruysdael as Father Moreno

William Conrad as Ollie

Rodolfo Acosta as Francisco Morales

King Donovan as Grieder

Robert Espinoza as Santiago

Tito Renaldo as Hank Torres

Margarito Luna as Antonio Morales

Emma Roldán as Catalina

George J. Lewis as Captain Rodriguez

Jack Elam as Arnie (uncredited)

Rock Hudson as Truck Driver (uncredited)

James Best as Driver (uncredited)

Nacho Galindo as Villager (uncredited)

Joe Dominguez as Bias (uncredited)

Paul Fierro as Bandit (uncredited)

Freddie Letuli as A Weaver (uncredited)

Margarita Martín as Frasca (uncredited)

Julia Montoya as Juanita (uncredited)

Howard Negley as Cop at First Accident Scene (uncredited)

Steve Pendleton as Cop at First Accident Scene (uncredited)

Julian Rivero as Mexican Villager with Horse (uncredited)

Kenneth Tobey as Cop at Second Accident (uncredited)

O.Z. Whitehead as Gas Station Proprietor (uncredited)