I'm trying to identify the name and composer of the piano piece at the
beginning of "Siege" (first season, episode 3 of the Beauty and the
Beast TV series.  There's an mp3 of it at
http://www.audioblogger.com/media/27846/75887.mp3

Thanks.

Hi linchpin,
  
This piece is the Piano Sonata "Pathetique" (2nd Movement "Adagio
Cantabile"), composed by Ludwig van Beethoven.
  
I found the title of the piece mentioned on this website:
http://www.iespana.es/labellaylabestia_es/bandasonoraENG.htm
(see "Scores" on the right)
  
I also found it mentioned here as well:
http://members.fortunecity.de/rowena/music_refer.html
(For some reason, my browser kept crashing when I clicked on this link)
  
If you also experience difficulty accessing the page, then go to:
http://64.233.161.104/search?q=cache:JpLbYbSC0cgJ:members.fortunecity.de/rowena/music_refer.html+&hl=en&ie=UTF-8
  
   
Here's a nice sound clip:
    
Beethoven's Sonata No. 8 in C Minor, Op 13 -- Adagio Cantabile"
(performed by Radu Lupu)
http://www.zcode.com/music/beethoven.ram
  
  
Search terms used:
music piano beauty beast siege
"Sonata Pathetique" Beethoven beauty beast siege
"Sonata 'Pathetique" "Adagio Cantabile"
   
  
     
Hope this helps.
    
  
Best regards,
   
Jackburton-ga

Very thorough response with plenty of helpful links.

An interesting bit of music trivia: Billy Joel uses this same musical
theme -- Beethoven's "Pathetique" Piano Sonata (2nd mov't.) -- in his
song "This Night", recorded on his album "An Innocent Man", first
released in 1983.

Thanks a lot, you guys!

Thanks for the tip, lichpin! :)