Michael Craig
Capt. Cyrus Harding
Acting
Joan Greenwood
Lady Mary Fairchild
Acting
Michael Callan
Herbert Brown
Acting
Gary Merrill
Gideon Spilitt
Acting
Herbert Lom
Captain Nemo
Acting
Beth Rogan
Elena Fairchild
Acting
Percy Herbert
Sgt. Pencroft
Acting
Dan Jackson
Cpl. Neb Nugent
Acting
Harry Monty
Pirate (uncredited)
Acting