The Huggetts Abroad (1949 Ken Annakin)

Olaf Pooley is the villain, Hugh McDermott the unlikely jewel thief in back projected Africa adventure, with Dinah Sheridan a replacement Huggett daughter. Like the last film, the villain, who in essence tries to kill the family by screwing with their compass, doesn't get a proper comeuppance (a punch in the jaw from Warden). What's going on?