Gi Joe A Real American Hero (Sunbow)

Worlds Without End (Part I) (1x36)

Air date: Nov 04, 1985

Cobra invents a matter transformer, but the Joes steal the machine's blueprints. The machine sends the Joes into an "alternate reality" universe where Cobra rules the world. Steeler gets sick from a diseased insect Destro created and gets lost while the rest of the team gets captured by Cobra Commander.