The X-Files (1993)

Paper Clip (3) - S3-E2

Visible crew/equipment: When Mulder and Scully enter the abandoned mine through a doorway, the viewer can see at right in the distance a number of people sitting on a wall, and one crouching in front of the wall with what looks like a dog. They are sitting still, but there is still movement there. (00:16:00)

Deep Throat - S1-E2

Mulder: They're here, aren't they?
Deep Throat: Mr Mulder, they've been here for a long, long time. (00:49:58)

The_Iceman

Teliko - S4-E3

Trivia: The initial footage of the episode was taken from the movie Airport 1975 (a Columbia Airlines jumbo jet). (00:00:01)

Show generally

Question: Was the Cigarette Smoking Man Mulder's biological father?

Socks1000