Lisa becomes friends with Sideshow Bob, who now has a new job working with genetically-altered foods. Meanwhile, Marge becomes frustrated teaching abstinence for the church.



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Episode cast overview:
Marge Simpson (voice)
Lisa Simpson (voice)
Sideshow Bob (voice)
Edna Krabappel (voice)
Lunchlady Doris / Shauna / Dolph / Jenny McCarthy / Monarno Research Woman / Mom At Museum / Old Lady / Various (voice)
Miss Hoover (voice)


To her surprise Lisa finds herself championing GM foods and more surprisingly working alongside chief scientist Sideshow Bob, released from prison to research into the subject. However when Bob takes Lisa to a museum she learns that he is genetically modifying himself to become stronger in order to carry on with his nefarious activities. When Bart tries to rescue Lisa Bob takes them both to the Springfield dam, where Lisa has to appeal to Bob's sense of reason to avoid a watery grave. Written by don @ minifie-1

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Animation | Comedy


TV-PG | See all certifications »




Release Date:

9 March 2014 (USA)  »

Filming Locations:

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Technical Specs

Sound Mix:


Aspect Ratio:

16:9 HD
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Did You Know?


The last appearance of Marcia Wallace as Edna Krabappel. See more »


[Flanders finishes reminiscing about Mrs. Krabappel]
Ned Flanders: Aw, I sure am gonna miss that laugh.
Nelson Muntz: Haw haw! I miss her, too.
See more »


References The Monkees (1966) See more »


Let's Call the Whole Thing Off
Written by George Gershwin and Ira Gershwin
Performed by Kelsey Grammer and Yeardley Smith (as "Let's Splice Some DNA")
See more »

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User Reviews

It's Good but it's The Worst Sideshow Bob Episode There is,
5 June 2014 | by (Ireland) – See all my reviews

The Man Who Grew Too Much is a great Simpsons episode with a very well written storyline and a ton of very funny scenes.I will admit when I found out a Sideshow Bob episode was being made,which hasn't happened in a good few years now,I was really looking forward to it,and I did find this one disappointing,it's good as a regular episode but as a Sideshow Bob episode it is a huge disappointment.Sideshow Bob episodes are usually really different from a regular Simpsons episode,but this one really wasn't,in fact I think it would have been much better if it was Professor Frink instead of Bob in this episode,it would have suited his character better.It's certainly Kelsey Grammers weakest episode as Sideshow Bob,but it's still an enjoyable episode with plenty of laughs.

Lisa is shocked to run into Sideshow Bob during a research trip,only to find she has a lot in common with Bart's nemesis.

3 of 4 people found this review helpful.  Was this review helpful to you?

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