To me as a child watching Lost in Space the difference between a robot and an android was clear. Robots were made of metal (mostly), clunky, and, well, er, robotic. Androids, on the other hand, looked like people with silver skin (usually), had the smooth movements of people, and were generally just more impressive than robots (sorry, Robot). “The Space Destructors” features an evil robot who seduces our Robot, but the law enforcement official is accompanied by what are called “mechanical men." Given that they are silver and don’t have much personality, they might just be androids.