"Where No Fan Has Gone Before" is the eleventh episode in the fourth season of the American animated television series Futurama. It originally aired on the Fox network in the United States on April 21, 2002. Set in a retro-futuristic 31st century, the series follows the adventures of the employees of Planet Express, an interplanetary delivery company. In this episode, the Planet Express team and most of the main cast of Star Trek: The Original Series face a court-martial after visiting the forbidden planet Omega 3.

An existing idea to feature the cast of Star Trek: The Original Series was scrapped and replaced with a new script written by David A. Goodman, after the newly hired writer was identified as the biggest Star Trek fan on the staff. All of the main cast of The Original Series agreed to appear, with the exception of DeForest Kelley – who had died in 1999, although a character in his likeness did appear, without speaking – and James Doohan, resulting in the creation of a new character called "Welshie". "Where No Fan Has Gone Before" was received positively by critics, with praise directed at the various Star Trek homages. The script was nominated for a Nebula Award, losing to The Lord of the Rings: The Two Towers.