Assault and Jewelry is the third episode of the spin-off, Sworn to Secrecy, and the third episode of season one. In this episode, Plankton and Mr. Krabs both have their eye on a ruby at the Barg N' Mart for different reasons. Plankton ends up getting the ruby, yet is threatened by Mr. Krabs. Plankton begins gloating to everyone around town that he knows about the ruby and how much it cost. Later that same day, Sandy heads over to the Chum Bucket to retrieve an engraving pen that Plankton borrowed, only to find Plankton laying half-conscious and crippled on a dining table. After rushing him to the hospital, Plankton is interrogating by the entire team in order to find clues to the attacker. Can they find the attacker? Who is the attacker?