Before V, before The X-Files, before Taken, and somewhere around UFO was a show called The Invaders, starring - oh who cares. It was by Irwin Allen, which is all you need to know - cool when you're 8, but to adult eyes it sucked so hard it made a black hole look like a hooker with a mouthful of Novocain. You know the plot: aliens are infiltrating earth with lookalike humanoids, which not only makes them hard to detect but keeps production costs way down.