Calificación
Reparto

Edmund Lowe
Dr. John Mandre

Lucile Fairbanks
Peg Campbell

William Henry
Jim Armstrong (as Bill Henry)

Ralph Morgan
Dr. Brady

Robert Middlemass
Sam Armstrong

Jean Brooks
Rae Langton

Mary Forbes
Mrs. Langton

Vince Barnett
Alaska

Clyde Cook
Yukon

Marjorie Wood
Ellen

Monte Blue
Flight Dispatcher

Kenneth Harlan
Flight Dispatcher

Leonid Snegoff
Dr. Recksner