When a new geothermal heating system is installed under the high school they "thaw out" a Neanderthal ancestor of Jughead!
| Actor | Role |
|---|---|
 Andrew RannellsArchie Andrews (Voice) | Archie Andrews (Voice) |
| CCamille SchmidtVeronica Lodge (Voice) | Veronica Lodge (Voice) |
 America YoungBetty Cooper (Voice) | Betty Cooper (Voice) |
| CChris LundquistJughead Jones (Voice) | Jughead Jones (Voice) |
| BBen BeckDilton Doiley (Voice) | Dilton Doiley (Voice) |
| JJerry LongeMoose (Voice) | Moose (Voice) |
| TTony WikePrincipal Weatherbee (Voice) | Principal Weatherbee (Voice) |
| PPaul SossoReggie Mantle (Voice) | Reggie Mantle (Voice) |