Bad Blood with Luke Wilson as the Sheriff
This is one of my favorite episodes. Luke Wilson does a good job playing a caricature of a good ol boy redneck Sheriff.
Scully and Mulder each remember different accounts of what happened and each tells their story. And it's funny.
This episode is about vampires. The X file duo set out to investigate strange exsanguinations of cows and people in a small town of under 400. Scully is infatuated with the sheriff, who has buck teeth according to Mulder, but not according to Scully. Mulder chases down a vampire and drives a stake through his heart. Scully arrives on the scene seconds later and discovers he is wearing fake vampire teeth. Fearing Mulder will go to prison they are discussing the case and the two stories are told. Then the body of the man Mulder killed wakes up in the morgue and attacks the pathologist before leaving. So the duo goes back to the town to investigate further. It is a funny story.