The X-Files: Season 4, Episode 17

4 - 17: Tempus Fugit (1)

Mulder and Scully are approached by a woman close to Max Fenig. The NICAP member and alien abductee was taking a plane to upstate New York, but she hasn't heard from him. Learning that the flight that Max was on has crashed, the agents head to New York State to search for the reason that Max was on that plane.