South Park (1997– )
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Roger Ebert Should Lay Off the Fatty Foods 

The boys investigate a mysterious conspiracy centered around the South Park Planetarium. Meanwhile, Cartman auditions for a TV commercial.



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Episode cast overview:
Stan Marsh / Eric Cartman / Barnaby Jones / Mr. Garrison / Cheesy Poof Spokesman / Dr. Adams / Van Gelder / Mr. Mackey / Teenager #2 / Clyde / Bill / Fosse / Competition Contestant / Judge #1 / Tom the News Reader / Officer Barbrady / Lighting Technician (voice)
Kyle Broflovski / Kenny McCormick / Barnaby Jones' Accomplice / Missy / Tommy / Man at Laser Show / Teenager #2 / News Reporter / Fosse / TV Announcer (voice)
Mary Kay Bergman ...
Mrs. Crabtree / Nurse Gollum / Principal Victoria / Liane Cartman / Starving Daughter / Starving Mother / Grandma Cartman / Sheila Broflovski (voice) (as Mary Kay Bergman aka Shannen Cassidy)
Chef (voice)


The class takes a field trip to the planetarium, but Cartman sneaks off to try out for a Cheesy Poofs commercial. Though the kids are bored at first, they come back from the trip eager to go again. The reason for this sudden change is explained when Mr. Mackey mind-melds with a frightened little boy who stowed away in the school bus. As the planetarium's secret is being revealed, Cartman is overjoyed to learn that he has been selected to be a Cheesy Poof. Written by Jean-Marc Rocher <>

Plot Summary | Add Synopsis

Plot Keywords:

planetarium | death of child | See All (2) »


Animation | Comedy






Release Date:

2 September 1998 (USA)  »

Company Credits

Production Co:

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Technical Specs


Sound Mix:


Aspect Ratio:

1.33 : 1
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Did You Know?


Based off the Star Trek episode Dagger of the Mind. See more »


The Planetarium guy says that he cannot pronounce the "t" in planetarium, and pronounces it "plane'arium". However on the return trip, he says "planetarium" normally. See more »


Cartman: [singing] I love Cheesy Poofs / We love Cheesy Poofs / If we all didn't love Cheesy Poofs / We'd be lame / I'm talking Night-Court-in-its-fifth-season lame!
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References Night Court (1984) See more »


Written by Kenny Loggins and Dean Pitchford
Performed by Kenny Loggins
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Frequently Asked Questions

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User Reviews

Good episode, but with a strange title
13 October 2008 | by (Canada(Montreal,Quebec)) – See all my reviews

The title of this episode is called "Roger Ebert Should Lay Off The Fatty Foods".It's a strange title since Roger Ebert is only mentioned once in the episode and has no significance to the plot.The plot has the children going on a field trip to the planetarium.The owner however has some hypnosis device which makes children want to go back and visit or work in the planetarium.His plan is to make everyone in South Park love the planetarium, but Stan and Kyle are on his case and try to stop him.Meanwhile, instead of going on the field trip, Cartman ditches and auditions for a cheesy poofs commerical.He is bad yet so is everyone else and he gets to be on TV.Only no one is really watching because they are all at the planetarium.This is a pretty funny and good South Park episode...but with a strange title!

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