How do you convince the world that aliens have secretly come to Earth and taken human form in a plot to take over the planet? That's the daunting and dangerous task faced by architect David Vincent (Roy Thinnes) who accidentally sees a UFO land and now must convince others to fight the threat - unless THE INVADERS silence him first! Now all 43 original episodes of the popular TV cult classic are available in one epic DVD collection - complete with a virtual galaxy of exciting special features designed to thrill any sci-fi fan.