The Pink Purloiner

Here's mine:

S1: Arrgh!

S2: Imitation Krabs

S3: Mid-Life Crustacean

S4: The Pink Purloiner

S5: SpongeBob vs. The Patty Gadget

S6: Pineapple Fever

S7: The Wreck of the Mauna Loa

S8: The Hot Shot

S9: CopyBob DittoPants

S10: Code Yellow

S11: Girls' Night Out

S12: A Cabin in the Kelp

S13: Plankton and the Beanstalk

S14: Hysterical History

S15: The Sandman Cometh

Because of 1, the way the episode ended, and 2, it was the last Season 4 episode in production order.