Is there a soundtrack available?
Yes. Lockdown records released a soundtrack on January 8th 2008.It features:Way Down in the Hole The Blind Boys of Alabama (S1 opening).
Way Down in the Hole Tom Waits (S2 opening).
Way Down in the Hole The Neville Brothers (S3 opening).
Way Down in the Hole DoMaJe (S4 opening)
The Fall - Blake Leyh (Episode ending theme)
I Feel Alright - Steve Earle (S2 montage theme)
Fast Train - Solomon Burke (S3 montage theme)
I Walk on Gilded Splinters - Paul Weller (S4 montage theme)
The Body of an American - The Pogues (Cole & Foerster wakes)
The Life, the Hood, the Streetz - Mullyman (Final scene of S4)
Oh My God - Michael Franti (Season 1)
Dance My Pain Away - Rod Lee (Ep 44)
Jail Flick - Diablo (Ep 44)
Projects - Tyree Colion (Ep 47)
What You Know About Baltimore? - Ogun + Phathead. (Season 5)and some Stelios Kazantzidis is also included, from some of the Greek semi-montage scenes in Season 2.Some of the most memorable dialog from the programs five years is also included on the album. The CD booklet features essays by the author and series writer George Pelecanos, series creator David Simon and the noted hip-hop journalist Jeff Chang.
What does the title of the series finale "-30-" mean?
"-30-" is a journalistic term that has been used to signify "the end", "over and out", and "a sign of completion" since the Civil War when telegraphers tapped "XXX", the Roman numeral signifying 30, to end transmissions.
Why did Bunk cut off his colleague's necktie?
It's a prank used by the officers in Bunk's department when someone falls asleep at their desk: you nod off for long enough or fall completely asleep, they'll cut your tie off. In a few episodes from previous seasons you can see a few quick shots of the bulletin board where they've tacked up the ties they've claimed. You can read more in the 3rd paragraph here.