The Welcome Back, Kotter flashback episode. The Sweathogs throw Kotter a surprise party before the start of the new semester. During the party, Kotter and the Sweathogs reflect back on all the good times they had over the first two seasons.

As the Kotters prepare for the birth of their baby, the Sweathogs discover that Barbarino got left back in the 10th grade.

Julie goes into labor and Gabe waits to hear what she has. After waiting impatiently, Gabe is surprised to learn he's the father of not one, but two baby girls.