The Sixth Extinction II: Amor Fati (3) - S7-E2
Trivia: "Amor Fati" is Latin for "Love of fate."
Musings of a Cigarette-Smoking Man - S4-E7
Trivia: Young Cancer Man is played by the same man who later plays Agent Spender - Cancer Man's son and Mulder's brother.
Trivia: Pusher tells Skinner, "Take a walk, Mel Cooley." Mel Cooley is a character played by Richard Deacon in The Dick Van Dyke Show, who is very similar in external appearance to Skinner. (00:23:05)
Trivia: "Agua Mala" is a quote from Ernest Hemingway's "The Old Man and the Sea" and means "Bad water" in Spanish.
Kill Switch - S5-E11
Trivia: "How sharper than a serpent's tooth to have a thankless child" - this is a quote from Shakespeare's tragedy "King Lear", Act 1 Scene 4. (00:02:15)
Trivia: Gethsemane is a garden in Jerusalem where Jesus prayed the night before his crucifixion.
Trivia: "Talitha cumi!" means "Little girl, I say to you, arise!" in Aramaic. These are the words of Jesus when he resurrected a dead Jairus' daughter (Gospel of Mark 5, 21 - 24 and 35 - 43).
Trivia: Throughout the course of its initial nine-year run, The X-Files had crossovers with 3 other television shows: the short-lived Millennium in the season 7 episode "Millennium," COPS in the season 7 episode "X-COPS" and Homicide: Life on the Street in the season 5 episode "Unusual Suspects." The crossover with Homicide: Life on the Street is especially noteworthy as that show was produced by a different network. The X-Files also had a non-canon crossover with The Simpsons in their season 8 episode "The Springfield Files."
Trivia: Tempus fugit is Latin for "time flies."
Trivia: Skinner's secretary Arlene that features in this episode is actor Mitch Pillegi's real-life spouse, also named Arlene.
Musings of a Cigarette-Smoking Man - S4-E7
Trivia: Towards The End of this episode, the Smoking Man states that the Buffalo Bills will never win a Super Bowl as long as he's alive. If we are to believe that the Smoking Man was killed by Mulder in what is as of now the final episode of the series, this statement ended up being true.
Trivia: The Smoking Man says to Jeremiah Smith: "Anyone who can appease a man's conscience can take his freedom away from him." This is a quote from "The Grand Inquisitor" by Fyodor Dostoyevsky. (00:30:52)
Trivia: In this episode, longtime character actor Sydney Lassick was cast to play Chuck Forsch, an over-sensitive and delusional patient in a psychiatric hospital. Eighteen years earlier, Sydney Lassick played a virtually identical delusional psychiatric patient, Charlie Cheswick, in the Oscar-winning film "One Flew Over the Cuckoo's Nest" (1975).
Trivia: The rock band Filter contributed music to this show, including their hit single "Hey Man Nice Shot" being used in the season 3 episode "D.P.O." as well as appearing on a couple X-Files soundtracks. Filter's lead singer Richard Patrick is the younger brother of Robert Patrick, who would later be cast in this show as Agent John Doggett.
Trivia: The echo effect in the series' theme tune was created purely by accident. Composer Mark Snow created the effect by resting his hand and arm on a keyboard which had an echo effect setting that had accidentally been turned on. Snow was so impressed with the riff that he wrote the theme around it.
Trivia: Rebecca Toolan plays David Duchovny's mother in the series, even though in real life she's only a year older than him.
Suggested correction: This entry is actually incorrect. There are records that prove she is much older than what's stated. By 1968, she married her first husband and was a university professor. Https://www.newspapers.com/clip/22109182/wedding-announcement-rebecca-cox-and/.
While there are many conflicting reports about Rebecca Toolan's age, it seems the Wikipedia entry is the most incorrect (which is where you got your source). It seems more probable than not that whoever edited her Wikipedia page linked a article about the wrong Rebecca Toolan.
