Complete Season 4 music information.

4X03 - Home
 
Song Title: Wonderful! Wonderful!
Artist: Johnny Mathis
Performed by: Kenny James
Album: Wonderful
Used in: The Taylors' death scene and the last scene
Download: Lyrics - Real Audio
Artist also heard in 3x17 - Pusher

 
4X07 - Musings of a Cigarette Smoking Man
 
Song Title: It's The Most Wonderful Time Of The Year
Artist: Andy Williams
Album: The Most Wonderful Time Of The Year
Used in: CSM's apartment when he was using his typewriter
Download: Lyrics

 
4X08 - Paper Hearts
 
Song Title: Paper Heart Intro
Composer: Mark Snow
Album: N/A
Used in: Teaser when the red light showed up

Song Title: Paper Hearts End
Composer: Mark Snow
Album: N/A
Used in: The end where Mulder hugs Scully

 
4X11 - El Mundo Gira
 
Song Title: Purple Rain
Artist: The Artist Formerly Known as Prince
Album: Purple Rain
Used in:
Mulder: "...But there have been reported cases of blue, purple, and green rains."
Scully: "Purple rain?"
Mulder: "Yeah, Great album. Deeply flawed movie though."
Download: Lyrics

Song Title: I Just Met a Girl Named Maria from West Side Story
Album: West Side Story Soundtrack
Used in: Mentioned - Mulder made several references throughout the episode
 
 
4X12 - Kaddish
 
Song Title: "Little" Fugue in G Minor
Composer: Johann Sebastian Bach
Album: Bach: Greatest Hits
Used in: One of the synagogue scenes.
Composer also heard in 1x03 - Conduit, 2x01 - Little Green Men
 

 4X13 - Never Again
 
Song Title: Tattooed Love Boys
Artist: The Pretenders
Album: The Pretenders
Used in: Beginning of episode where Ed is in the bar
Download: Lyrics - Real Audio
 
Song Title: Doesn't Somebody Want To Be Wanted
Artist: The Partridge Family
Album: Up To Date  - The Definitive Collection
Used in: Before Ed went to kill downstairs neighbor
Download: Lyrics

Song Title: The Have Nots
Artist: X
Album: Under the Big Black Sun
Used in: Background music of the club Scully and Ed Jerse go to. (Thanks frumious bandersnatch for the listing! Thanks Heather for song title!)
Artist also heard in 2x07 - "3", The X-Files FTF Soundtrack

Song Title: The Ouroboros
Composer: Mark Snow
Album: -
Used in: The music while Scully gets her tattoo.

Song Title: Disco Inferno
Artist: -
Album: -
Used in: Part of the Mark Snow's score for the episode, as Ed Jerse drags an unconscious Scully down the stairs. (Thanks frumious bandersnatch for the listing!)

 
4X14 - Leonard Betts
 
Song Title: 2nd Movement from Piano Concerto No. 4
Composer: Lundwig Van Beethoven
Album: Beethoven: Complete Piano Sonatas & Concertos
Used in: Music at the hospital
Composer also heard in 3x18 - Teso Dos Bichos
 

4X15 - Momento Mori
 
Song Title: Momento Mori Intro
Composer: Mark Snow
Album: -
Used in: The teaser while Scully has her opening monologue
 

4X18 - Max
 
Song Title: Unmarked Helicopters
Artist: Soul Coughing
Album: Songs in the Key of X
Used in:  When Mulder and Scully first go check out Max's trailer, this song was playing inside
Download: Lyrics
Artist also heard on The X-Files FTF Soundtrack

 
4X20 - Small Potatoes
 
Song Title: (Ain't It) Funny How Time Slips Away
Artist: Al Green
Album: Call Me
Used in: Near the end of episode, where "Mulder" (really he's Eddie) tries to seduce Scully, while they share wine and past-time stories
Download: Lyrics - Real Audio