A 12-year-old orphan who has just inherited a fortune is trapped on an island with his uncle, a former British intelligence commander who intends to kill him. A young girl is the boy's only ally against the sarcastic uncle, who uses hypnotism, a pool of sharks, fire, and poisonous mushrooms as weapons.
Nigel Green
Major Kevin Harrison
Mary Badham
Chrissie
Pat Cardi
Barnaby Harrison
Robert Pickering
Travis
Linda Lawson
Justine
Ref Sanchez
Ketchman
Nestor Paiva
Steward
William Castle
Russell Harrison (in car wreck) (uncredited)
