"Attack of the Autobots" the Transformers, October 4, 1985
The Autobots repel a Decepticon attack on the Ark, but it was actually a diversion. Megatron and Starscream, both coated in invisible paint, sneak into the base and sabotage the Autobot's recharging pods.
The next day, things start out normal, at least until Optimus Prime smashes their computer. The only Autobots who didn't rechage were Jazz and Bumblebee, who were out in the woods playing with Jazz's new sound system. When Bluestreak tries to force Bumblebee into a pod, Jazz stops it. Sparkplug manages to fix the computer, which tells them the Autobots are now evil.
Optimus leads the Autobots to attack a nearby Air Foce base while Sparkplug and Jazz try to cure them. Sparkplug invents a device that "drain evil then recharge good". Not sure how that works, but ok.
From there the Autobots continue their assault while the Decepticons try to steal a satellite. Can the uninfected cure the infected in time?
Not terrible, although questions keep getting raised. Invisible paint? Something that drains evil? Plus the Autobots don't get called out for their actions here, but eh, at least Toei is back to doing the animation.