The Greenhouse Effect

A top secret nitrogen rocket fuel is stolen from the Joes and is accidentally stored in a greenhouse. The plants grow immensely, giving Destro a plan to seed the world with mutated fruits and vegetables to crush G.I. Joe in a gigantic jungle.

"Now you know. And knowing is half the battle." The Sunbow run closed every episode with a public-service spot delivered by a Joe character, addressing kids on a real-world hazard or virtue. The cartoon's deeper ethic, threaded into the writing across the run, was that Cobra's worldview was based on fear and the Joes' was based on responsibility.

Chris Latta as Cobra Commander

Michael Bell as Duke, Lifeline, Xamot, Blowtorch

Arthur Burghardt as Destro

Morgan Lofting as Baroness

Mary McDonald-Lewis as Lady Jaye, Cover Girl

Bill Ratner as Flint

B.J. Ward as Scarlett

Neil Ross as Shipwreck, Doc, Tomax

Frank Welker as Torch, Wild Weasel, Junkyard, Zandar

Zack Hoffman as Zartan

Charlie Adler as Low-Light

Dick Gautier as Serpentor

1. Sunbow Season 1 daily run (1985). 55 episodes aired Monday through Friday in afternoon syndication, September to December 1985.
2. Production code: 600-21
3. Studio: Marvel Productions / Sunbow Productions / Toei Doga
4. Originally aired: October 3, 1985 in afternoon syndication.