|This article is about a/an episode in Mighty Morphin Power Rangers.|
A Chimp in Charge is the one hundred and fortieth episode of Mighty Morphin Power Rangers.
The 18th Zeo Serial Short aired before a later airing of the episode.
Katherine and Aisha help teach a monkey, Kelly, to communicate with sign language for a school assignment. However, Rita Repulsa and Lord Zedd turn the monkey into the Sinister Simian monster to lure the Power Rangers out to fight it. Now, the Rangers have to find a way to defeat the monkey monster without harming it and return the monkey back to normal.
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- Jason David Frank as Tommy Oliver (Mighty Morphin White Ranger)
- Steve Cardenas as Rocky DeSantos (Mighty Morphin Red Ranger)
- Johnny Yong Bosch as Adam Park (Mighty Morphin Black Ranger)
- David Yost as Billy Cranston (Mighty Morphin Blue Ranger)
- Karan Ashley as Aisha Campbell (Mighty Morphin Yellow Ranger)
- Catherine Sutherland as Katherine "Kat" Hillard (Mighty Morphin Pink Ranger)
- Paul Schrier as Farkas "Bulk" Bulkmeier
- Jason Narvy as Eugene "Skull" Skullovitch
- Richard Genelle as Ernie
- Gregg Bullock as Lt. Jerome Stone
- Royce Herron as Ms. Appleby
- ??? as Fruit Seller
- David Fielding as Zordon (face)
- Robert L. Manahan as Zordon (voice)
- Sandi Sellner as Alpha 5
- Richard Steven Horvitz as Alpha 5 (voice)
- Carla Perez as Rita Repulsa
- Barbara Goodson as Rita Repulsa (voice)
- Ed Neil as Lord Zedd
- Robert Axelrod as Lord Zedd (voice) and Finster (voice)
- Danny Wayne Stallcup as Goldar
- Kerrigan Mahan as Goldar (voice)
- Bob Papenbrook AS Rito Revolto (voice)
- Michael J. Sorich as Squatt (voice)
- Dave Mallow as Baboo (voice) (as Colin Phillips)
- Brianne Siddall as Sinister Simian (voice)
- Final appearance of the White, Pink, Yellow, and Blue Ninja Rangers, as well as the last use of the Ninja Ranger forms.
- Last appearance of Ms. Appleby in Mighty Morphin Power Rangers. She makes her first and only Power Rangers Zeo appearance in "A Brief Mystery of Time". Though, archive footage of her is used in "There's No Business Like Snow Business", Part 1.
- Apart from the "powering up" shots, the Zord fight is entirely American-produced footage. In Kakuranger, the monster was defeated by the Battle Borgs.
- Finster references King Kong.
- Ironically, Bulk and Skull would later come to understand a whole lot more about chimpanzees when they are transformed into some during the first half of Power Rangers Turbo.