as Dr. Frank Mannering
as Will Scarlett
as Capt. Keith Lambert
as Dr. William 'Bill' Burns
as Frank Andrews
as Julian March
as Harry Markham
as Edmund 'Mac' MacLean
as Dudley Horn
as Captain Grant
as Ivor Morgan
as Charles de Marigny
as Captain Perry Vickers
as Dr. Roger Gretorex
as Josef Cartier
