Jose Chung returns.
the opening shot in this episode is a reference to the one in Star Wars. Blaine Faulkner also has a model of the Millenium Falcon hanging from his ceiling.
Blaine mentions being a fan of the game.
The Man in Black portrayed by Alex Trebek was mentioned resembling the game show host.
T-Shirt in episode
The book "From Outer Space by Jose Chung" that Scully reads at the end of the episode is a trivial collectable item in the game. It can be picked up from the nightstand by the bed in Mulder's motel room at the Comity Inn. The last page from the book with the same text that Chung reads at the end of the episode will then pop up on screen.
Alien autopsy video from the episode can be seen on the counter in Wetwired Video under the title "The Stupendous Yappi's Dead Alien! Truth or Humbug?"
The scene of an alien autopsy turning out to be a guy in an a fake alien costume happens in both media.
Mulder was seen watching the film in bed.
Lieutenant Schaefer sculpts a mountain out of his mashed potatoes while at the diner with Agent Mulder.
Scully's 'alien' autopsy