SpongeBob SquarePants

Season 1, Episode 27

Episode Title: I Was a Teenage Gary

Air Date: 1999-10-28

Overview:

Gary becomes sick when Squidward forgets to feed him, so a doctor has to come and give Gary some medicine. The doctor has Squidward give Gary the shot. Squidward accidentally gives the medicine to SpongeBob instead of Gary, which turns SpongeBob into a snail.