- Casting Gag: Hmmmm, Roddy McDowall in a film where mutated apes hunt and kill humans. Where one might have heard that before?.
- Enforced Method Acting: Shakma's angry bashing of doors is often quite real; they hid a female baboon in heat behind the door in question and hormones kicked in. Best of the Worst "helpfully" pointed out the ape's visible erection during these scenes.
Trivia / Shakma