"What Ever Happened to SpongeBob?" is the 18th episode of the fifth season of the American animated television series SpongeBob SquarePants, and the 98th episode overall. It first aired on Nickelodeon in the United States on October 13, 2008.

The fifth season of the American animated television series SpongeBob SquarePants, created by former marine biologist and animator Stephen Hillenburg, aired on Nickelodeon from February 19, 2007, to July 19, 2009, and contained 20 half-hour episodes. The series chronicles the exploits and adventures of the title character and his various friends in the fictional underwater city of Bikini Bottom. The season was executive produced by series creator Hillenburg and writer Paul Tibbitt, who also acted as the showrunner.