The X-Files - Season 10

"My name is Fox Mulder. Since my childhood, I have been obsessed by a controversial global phenomenon. Since my sister disappeared when I was 12 years old... in what I believe was an alien abduction. My obsession took me to the FBI, where I investigated paranormal science cases through the auspices of a unit known as the X-Files. Through this unit, I could continue my work on the alien phenomenon, and the search for my missing sister. In 1993, the FBI sought to impugn my work, bringing in a scientist and medical doctor to debunk it... which only deepened my obsession for the better part of a decade, during which time that agent, Dana Scully, had her own faith tested. In 2002, in a change of direction and policy, the FBI closed the X-Files, and our investigation ceased, but my personal obsession did not."
[Intro Season 10]

"But we must ask ourselves... are they really a hoax? Are we truly alone? Or are we being lied to?"

Mulder: "I need access to the X-Files."
Skinner: "Can you tell me what this is about?"
Mulder: "It's about controlling the past to control the future. It's about fiction masquerading as fact."

"The why is more complicated than you may ever know, Mr. Mulder."

"The lies are so great, Mr. Mulder. The truth must be unassailable."

Fox Mulder: "I think you're the O' Reilly Factor with a shop worn little gimmick."
Tad O'Malley: "What Bill O' Reilly knows about the truth could fill an eye dropper."

Tad O'Malley: "I'm not some Johnny-come-lately to the UFO phenomenon, Mr. Mulder. Like yourself, I'm a true believer."
Fox Mulder: "No, I only want to believe. Actual proof has been strangely hard to come by."