Mad scientists

Mad scientists are those scientists who meddle in domains where they should not, create monsters and death devices, and/or cackle maniacally over bubbling beakers (not Beakers). Some of these mad doctors were well intentioned but their experiment ran away from them (often literally), as with the archetypal Dr. Frankenstein. Other famous literary mad scientists include Dr. Jekyll and Griffin from The Invisible Man.
Mad scientists are popular figures in science fiction and horror movies (Boris Karloff played four in a series for Columbia Pictures, while Bela Lugosi and Vincent Price played their share as well), where they are often assisted by an Igor. They proved durable villains in comic books (the early version of Lex Luthor in Superman comics, Dr. Sivana to Captain Marvel, Marvel's Doctor Doom, and the majority of Spider-Man's enemies). Cartoons and comedy shows often feature more benign versions, still cackling and conducting crazy experiments but either incompetent or actually good guys. The Muppets have followed suit. 
This list excludes those scientists who are merely wacky or eccentric (although at times Dr. Bunsen Honeydew skirts the line or has portrayed a mad doctor outright), focusing instead on those designed to reflect the stock character.
==Early Muppets==
Character.professormadcliff.jpg|Sam and Friends
MadScientistWilson's.jpg|Wilson's Meats
Shrinkenstein.1.JPG|Shrinkenstein
==The Muppets==
Madbunsen-catcora.jpg|The Muppets Kitchen with Cat Cora"Movie Night"
Professor-Krassman.jpg|The Muppet Movie
Drstrangepork-movies.jpg|The Muppets Go to the Movies
Theotherdrphil.jpg|
Time in a Bottle scientist.jpg|The Muppet ShowEpisode 207
==Sesame Street==
Drgrouch-1363.jpg|Episode 1363"the mad, and I mean mad scientist" (cut script line)
Rainbrain.JPG|"Countdown" sketch
3093d.jpg|Episode 3093
Character.vonfission.jpg|Sesame Street News Flash: The Six Dollar Man
==Animated characters==
Baronrotweiler-mad.jpg|Dog City"Comedy of Horrors" and other episodes
SSShowID--Mad Scientist.jpg|Sesame Street Show ID used in seasons 3 through 6
Madscientist-stang.jpg|Sesame Street 
Monster.frontback.jpg|Sesame Street 
Robotwalk.jpg|Sesame Street 
Madscientist.FRED.jpg|Sesame Street 
Frankenstein-bodyparts.jpg|Sesame Street 
==Video games==
Drgrump.jpg|Muppet Adventure: Chaos at the Carnival
Petrie.jpg|Muppet Monster Adventure
==Other==
SkekTek.jpg|The Dark CrystalThe Dark Crystal: Age of Resistance
Dr.Fiend.jpg|Dinosaurs"Monster Under the Bed"
Drfreebie.jpg|Dinosaurs"Scent of a Reptile"
DoctorFaboo.jpg|Brats of the Lost Nebula
Farscape-mad.jpg|Farscape
Namtar.jpg|Farscape"DNA Mad Scientist"
Kaarvok.jpg|Farscape"Eat Me"
Madscientist-littleswamp.jpg|"Little Swamp of Horrors" comicMuppet Magazine #16
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