A Welcome Back, Kotter flashback episode. The Sweathogs share Christmas memories as they help the Kotters trim their tree.

The Sweathogs host a radio station at school, but Horshack's ratings are so bad that he gets canceled. In his final broadcast, he becomes a radical radio broadcaster causing his ratings to soar.

Woodman brings a computer into the Sweathogs' class to teach their lessons and the class grades increase dramatically. But now, Kotter is jealous because the computer is making him feel obsolete.