"The Simpsons 138th Episode Spectacular" is the tenth episode of the seventh season of the American animated television series The Simpsons. It originally aired on the Fox network in the United States on December 3, 1995. As the title suggests, it is the 138th episode and the third clip show episode of The Simpsons, after "So It's Come to This: A Simpsons Clip Show" and "Another Simpsons Clip Show". While the "138th Episode Spectacular" compiles sequences from episodes throughout the entire series like the previous two, it also shows clips from the original Simpsons shorts from The Tracey Ullman Show and other previously unaired material. Like the Halloween specials, the episode is considered non-canon and falls outside of the show's regular continuity. The "138th Episode Spectacular" was written by Jon Vitti and directed by David Silverman, and is a parody of the common practice among live-action series to produce clip shows. It has received positive reviews, and was one of the most watched episodes of the seventh season, with a Nielsen rating of 9.5. Synopsis Troy McClure hosts the episode, which highlights individual scenes and sequences from throughout the series and offers never-before-seen outtakes. McClure starts the episode by showing a brief presentation of how The Simpsons series was conceived by Matt Groening, James L. Brooks, and Sam Simon. He goes on to present some clips of the original shorts that aired on The Tracey Ullman Show. McClure then responds to questions from fan mail by showing clips that contain the answers. McClure then presents deleted scenes from several episodes and reveals that alternate endings to part two of "Who Shot Mr. Burns?" were created to prevent the staff on The Simpsons from spoiling the mystery. Troy McClure ends the episode by showing a montage of The Simpsons characters naked, set to the KC and the Sunshine Band song "(Shake, Shake, Shake) Shake Your Booty". Production As the title suggests, "The Simpsons 138th Episode Spectacular" is the 138th episode of The Simpsons, although it is the 155th episode when placed in production order. It is the third The Simpsons clip show, after "So It's Come to This: A Simpsons Clip Show" and "Another Simpsons Clip Show". It was written by Jon Vitti, who used the pseudonym "Penny Wise" in the closing credits because he did not want to be credited for writing a clip show. The episode was directed by