Call the Cops

Plankton is arrested, and the Krabby Patty formula is taken as evidence. SpongeBob and Mr. Krabs impersonate police officers to get it back, catching a real criminal along the way, while Plankton is put in a cell with Patrick and tries to escape. After a long fight in the evidence room, SpongeBob (who told the truth out of fear) and Mr. Krabs are arrested and locked up in the same cell with Plankton, Patrick, and the criminal.