Sheldon J. Plankton was born on the same day as Mr. Krabs, on November 30, 1942. However, Stephen Hillenburg originally planned his birthday to be on August 21, 1961, like his own birthday. Plankton's parents we… See more

When the "Plankton!" episode was pitched to Nickelodeon, the series' creator Stephen Hillenburghad already decided that he wanted Lawrence to play Plankton. However, network executives wanted a guest star t… See more

Plankton is egotistical, aggressive, evil and power-hungry. He is very jealous of Mr. Krabs and his success. His only goal throughout the series is stealing the Krabby Patty secret formula and running Krabs out of business… See more

Plankton is married to Karen, a waterproof supercomputer. Plankton built Karen himself out of a calculator and a mass of wires. She was originally a simple security system, as revealed in "Friend or Foe," but has becom… See more