Ghosts on Film

(This synopsis was written from memory; the show is not being aired anymore and I have no copy of the episode available for reference. I last saw it a few months before writing this, so my memory is still relatively fresh, but not complete. Please bear with me if any parts are vague and if guest characters names are omitted; I can't remember everything. Ken Robinson) A young boy is watching an old (and obviously very cheap) movie, which his grandfather directed many years ago. Apparently, it was unreleased to the public; one of the actors was killed during filming, preventing it from being completed. The only copies in existence are the rough cuts that are owned by this boy and his grandpa. These copies even include the footage of the death, caught on camera. The film itself is all about a space tyrant's attempts to conquer the Earth. Good thing it's only fiction, huh? Well, that's not exactly true. This tyrant, Morgg the Merciless, soon leaves the film and enters the real world.