An alien race comes to earth, promising peace and prosperity, and sharing technology. A United Nations linguist and his team set out to translate the alien's language, using a book whose title they deduce is "To Serve Man." The episode was broadcast in 1962, and written by occultist Damon Knight. 
(YouTube link) (3:00 on counter)
The alien is a giant standing 9 feet tall. It is reminiscent of Goliath the Philistine, who some believed to be from the race of Nephilim. (The Nephilim were destroyed in the flood.)
Isn't it ironic that the UN has a recently assigned "Ambassador to the Aliens," for such a time as this.
As the alien loads his human passengers onto his ship, it makes me think about how gullible and easily misled people are. We see the same thing happening today, where some know what it occurring in our world and others are totally clueless. This is why they will accept the message of the Antichrist - presenting half truths.