The Simpsons 500 Keys (Season 22, Episode 21)
TV-14
TV Episode | 30 min | Animation, Comedy

The Simpsons

500 Keys (Season 22, Episode 21)

TV-14

TV Episode | 30 min | Animation, Comedy

While Homer takes the Duff Blimp for a joyride, Lisa discovers a secret room in the basement of Sprinfield Elementary School.

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Cast	+ Add Cast
10 cast members

Name	Known for
Dan Castellaneta Homer Simpson / Wiseguy / Guy with a letter / Barney Gumble / Gil Gunderson / … (voice) See more Homer Simpson / Wiseguy / Guy with a letter / Barney Gumble / Gil Gunderson / Mayor Quimby / Key Man (voice) See fewer	The Simpsons (1989)
Julie Kavner Marge Simpson (voice) Marge Simpson (voice) See fewer	The Simpsons (1989)
Nancy Cartwright Bart Simpson / Todd Flanders / Nelson Muntz / Ralph Wiggum / Joe Spuckler (voice) Bart Simpson / Todd Flanders / Nelson Muntz / Ralph Wiggum / Joe Spuckler (voice) See fewer	The Simpsons (1989)
Yeardley Smith Lisa Simpson (voice) Lisa Simpson (voice) See fewer	The Simpsons (1989)
Hank Azaria German Biker / Chief Clancy Wiggum / Kirk Van Houten / Professor Frink / Duffman / … (voice) See more German Biker / Chief Clancy Wiggum / Kirk Van Houten / Professor Frink / Duffman / Irritable Bowel Syndrome Support Group Man / Superintendent Chalmers / Cletus Spuckler / Snake (voice) See fewer	The Simpsons (1989)
Harry Shearer Ned Flanders / Dr. Hibbert / Reverend Lovejoy / Principal Seymour Skinner / Otto Mann (voice) Ned Flanders / Dr. Hibbert / Reverend Lovejoy / Principal Seymour Skinner / Otto Mann (voice) See fewer	The Simpsons (1989)
Albert Brooks Hank Scorpio (voice) (as A. Brooks) Hank Scorpio (voice) (as A. Brooks) See fewer	Drive (I) (2011)
Chris Edgerly Additional Voices (voice) Additional Voices (voice) See fewer	Passengers (I) (2016)
Pamela Hayden Milhouse Van Houten / Rod Flanders (voice) Milhouse Van Houten / Rod Flanders (voice) See fewer	The Simpsons Movie (2007)
Tress MacNeille Irritable Bowel Syndrome Support Group Woman / Nancy Drew / Brandine Spuckler / Mary Anne / Agnes Skinner (voice) Irritable Bowel Syndrome Support Group Woman / Nancy Drew / Brandine Spuckler / Mary Anne / Agnes Skinner (voice) See fewer	The Simpsons (1989)