The day Young Sheldon has long dreaded has finally come: the swimming unit in P.E. class. Despite his fear of water, Young Sheldon discovers that he’s actually pretty good at it. That is until he jumps off the high dive and emerges from the water sans swimming trunks. Embarrassed, Young Sheldon tries to hide in the locker room until he gets some encouragement from Joe the Janitor (Avery Brooks).