SpongeBob SquarePants - Season 6 Episode 4 -

Not Normal: When Squidward points out to SpongeBob that he's not normal, SpongeBob makes it his mission to become normal. SpongeBob begins to lose all his spongey-ness, and it's not long before he's completely unrecognizable, even to his best friends. Could this be the end of SpongeBob SquarePants as we know him? Gone: SpongeBob wakes up one morning to find that everyone in Bikini Bottom is gone - even Gary!