Season 1- Deep Throat

Deep Throat (episode 1x01) originally aired on September 17 , 1993 .

Agent Mulder and Agent Scully investigate the disappearance of US Air Force colonel Robert Budahas. Mulder thinks that it's related to disappearances of six other pilots from an air base after flying experimental aircraft. Specifically, Mulder believes that these aircraft were built using extraterrestrial technology procured from UFOs .

A mysterious man known in the series as Deep Throat contacts Mulder and recommends that he stop his investigation. Mulder ignores that and, with Scully, visits Anita Budahas, wife of Colonel Budahas. She describes her husband's somewhat erratic behaviour as well as his unwillingness to discuss any questions related to his work.

Mulder tells Scully of Aurora , a mysterious aircraft supposedly created by The Pentagon with UFO technology. During the night, they witness two objects flying in the sky. The agents find two teenagers who sneaked into an airforce base. They tell the agents that they have seen all sorts of strange flying objects above the air base, and Mulder believes them.

Unexpectedly, Anita Budahas reports that her husband has returned. The agents visit the Budahas residence, but the colonel can't remember any interesting details, simply insisting he has been in a hospital for some time. He appears, however, absolutely sane. Mulder theorizes that colonel's memory might have been changed to prevent him from remembering his test flights.

Mulder and Scully are stopped while driving by a group of men in black who destroy the pictures of strange objects the agents earlier took and order them to leave the city. Mulder, however, decides to sneak into the air base the same way as the two teenagers did. He is eventually discovered by the base security and doctors can be seen performing some procedures on him.

Scully is able to exchange Mulder for a military man who, as she discovered, was spying on the agents, but Mulder is unable to remember anything. Back in Washington, Deep Throat meets Mulder again. Deep Throat mentions that Mulder has chosen a dangerous path and both he and agent Scully are now in danger.