Rover was this balloon-looking white ball thing, that also resembled the interior of a lava lamp. When someone tried to escape, it was one of the methods used to track them down (it would absorb the person, a process which appeared intensely painful, and then spit them out back at the main HQ).

Oh, so THAT'S what happened to them. I thought they died of suffocation or something. I was just a young'un when I saw it, so I didn't really understand it.

Faw"The lighthouse IS the rocket!"cett