Plankton!

'Plankton! is a SpongeBob SquarePants 'episode from season one. In this episode, Plankton uses mind control to obtain the Krabby Patty formula.

Plot
At The Krusty Krab, Squidward sends SpongeBob an order for a Krabby Patty and it ended up in his nose. After making the patty, it begins to "move" and makes its way towards the front door. Mr. Krabs pulls Plankton out of the burger and sends him back to the Chum Bucket. Krabs explains that Plankton is his arch-competitor, and has been trying to steal the Krabby Patty's secret formula for years. That night, after the Krusty Krab closes, Plankton tries to convince SpongeBob that he and the fry cook are friends, and that as such SpongeBob should give him a Krabby Patty. SpongeBob refuses and runs back home, but Plankton promises that SpongeBob will "hand deliver it to (him) personally."

Later that night, Plankton enters SpongeBob's head through a pore and makes his way to SpongeBob's brain. He attaches a mind control device to the brain and bends SpongeBob to his will, forcing him to walk to The Krusty Krab, get a Krabby Patty, and bring it to the Chum Bucket's Laboratory

Plankton shows SpongeBob his computer, Karen, who can display the components of whatever he places in a nearby bowl. Before he can force SpongeBob to drop the Krabby Patty in, SpongeBob begins a sorrowful ode to the Patty describing its tastiness. A hungry Plankton leaps onto the burger, bounces off its bun and falls into the bowl, and says "Oh Boy!", before being absorbed by the device. Karen displays his components -1% evil, 99% hot gas- on the computer screen before displaying Plankton himself onto the screen. With Plankton stuck inside the computer, SpongeBob walks back home with Plankton trying to tell him to give him back the Krabby Patty.