The Archies in JugMan (2002)

A new geothermal heating system is installed beneath the high school, but the excavation accidentally thaws out a frozen Neanderthal. To everyone's shock, the ancient caveman turns out to be a direct ancestor of Jughead. Chaos and comedy ensue as the prehistoric relative adapts to modern life, causing trouble in the halls and forcing Jughead to deal with his long-lost family history in the most unexpected way.