Science Fiction And Fantasy Comedies That Hit Harder Than Most Dramas

A lot of people seem to think "funny" equals "light-weight." Like a comedy can't deal with important issues, or pack a huge emotional punch. But decades of science fiction and fantasy comedy prove otherwise. Which funny story actually hits you where it counts, more than most "serious" dramas do?

Please include a picture, book cover or clip for your chosen comedy. And please mention why it hits so hard. Thanks!

Top image: Galaxy Quest. Scroll down for why.