I love the Twilight Zone. One of my favorite's is when these people adopt a little girl who doesn't talk at all, but secrety has telekenetic powers, the episode is called "mute".
Another one is when these people from a bus walk into a diner, but there's actually an alien and the people try to indentify the alien. The episode is called, "Will the real martian please stand up"
There's alot more, but I think I'll stop here :P