Casper and the Angels

Prehistoric Hi-Jinx (1x23)

Air date: Dec 08, 1979

Mini and Maxi get assigned to guard a scientist's lab, and Casper, Hairy, Nerdley and Fungo follow them to keep an eye on things. When the boys arrive at the lab, all but Casper accidentally trigger a time machine and wind up in prehistoric times, and its up to the others to rescue them.