Of all the various subgenres attached to the sci-fi domain, alien invasion flicks come off as timeless favorites. Here are five of the very best.

'The aliens are coming to Earth? I'm going, 'Here’s the bill. Credit or debit? Have a good day.’' When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

The broader science fiction genre can explore various subjects, from time travel and space travel to dystopian societies and utopias facilitated by technological advancements. Among the sci-fi genres, ...