Trivia: The box-like entrances to the underground lair proved problematic for the Space Rat actors. When several of them were supposed to spill out on cue, the box walls and their heavy helmets prevented them from hearing the director, who repeatedly screamed "Action!" to no avail. A lone voice from inside the box eventually shouted back, "Can't hear you!"
Trivia: The giant Kairos ant had a contortionist inside its costume, walking face up on splayed hands and feet. This worked well in rehearsals - on a flat studio floor. On outdoor location, unfortunately, he could neither see nor navigate the terrain, and fell into a ditch, reportedly treating the film crew to some "rather colorful language" in the process.
Trivia: A physician who treated Paul Darrow for a chipped ankle bone (incurred in a fall during a fight scene) was appalled to learn he'd be going back on location to do more stunt work the same day, taped ankle or no. "Must you fight the bad guys?" the doctor implored. "Can't you just, well, sit down and talk to them?"
