The one where William Shatner fought that invisible human-hunting alien, in a time machine shaped like a police call box.
(Edited 2 minutes later.)
The one where it’s the year 3,000, The aliens are alcoholics and are here to steal earth’s beer.
They land in the ocean and conquer the dolphins. The dolphins take them to land and the first person they encounter is a six-year-old girl. Due to a strange quirk of their culture, they decide that the girl is the rightful ruler of the world.
(Edited 56 seconds later.)