I been watching lot of X-files, some of my favorite series. Just watched the episode called "Improbable" from season nine. The episode opens with a view over a casino table with players and Karl Zero's "Ca va ca va". When you are used to watch some favorite series of yours you get used to the music what they use. In X-files Mark Snow makes mostly all the music and outside music is used rarely. Because usually it's about empty, dark backyards, dark holes in the ground, in the attic, in a empty factory, what kind of music should a serial killer have?
Here is a very useful link if you want to know other songs what they used in the series.
Sometimes the scariest combinations come when you have something totally opposite. Like in one episode called "Invocation" from season eight with the song "All the pretty little horses" which is a children's lullaby. This was the closest version I could find.
Alfred Deller - "All the pretty little horses"
But back to Karl Zero, here is the opening song. Just imagine this song and X-Files. Together.
Karl Zéro - "Ca va ca va"
And a small X-Files video from the episode Improbable
with the song "I love you for sentimental reasons"
One other episode I remember well is "Triangle" where Mulder gets stuck to Queen Anne boat in the Bermuda triangle. http://en.wikipedia.org/wiki/Triangle_(The_X-Files) The episode has amazing music in it.
"Sing, Sing, Sing In Swing" by Louis Prima (for Benny Goodman)
"Jeepers Creepers" by Ethel Waters
Check also Dick Walters: "Hot Liquorice".
And small clips from one of my favorite X-files episodes.
"How the ghosts stole Christmas"
And the second one.
And the episode ended with a Christmas song "Have Yourself A Merry Little Christmas" by Bing Crosby. But I think the version of Judy Garland (From the Wizard of Oz) is better.
But I have to end this post with this, quite legendary tune by Mark Ayres.
And to the poster that is also quite legendary.
The truth is out there!