Been trying to find an episode of *something*, with no luck. Had originally thought it was G.I. Joe, but it doesn't appear to be mentioned anywhere this doll can find, and can't even find it as an episode of some other cartoon. It involved a computerized space exploration vehicle that -

broke loose on Earth. Can't remember for sure what planet it was set to explore, but keep thinking maybe Venus? Either way, it was defeated with water, as that was the *one* contingency it wasn't designed for, since they were sure it wouldn't encounter *that