star trek iv: the voyage home. aka the one set in the 70s about kidnapping a couple of whales. it's an amazing time, one of the best fish-out-of-water comedies to date
also you get to watch spock try to cuss and it's perfect every time
"if you only watch one star trek, if you are only going to take on a singular star trek, it's got to be the one with the whales."
"maybe if you watch two then you can do the one with khan."