Denver, the Last Dinosaur S01E16 - The Phantom of the Movie Theater

Denver, the Last Dinosaur (1988)
S01E16 The Phantom of the Movie Theater
Episode Overview
Heather and Wally's parents announce that they will be hosting out-of-town guests, prompting the siblings to scramble to keep Denver a secret. This is particularly important because the local movie theater is rumored to be haunted, and they don't want their visitors to find out about it.