I love this show.
Even though the narrator overdoes his narrative voice, the graphic videos and the stories that they uncover never fails to surprise and/or shock me.

Here are my favorite episodes:

http://www.youtube.com/watch?v=9S_FILlbjSU

Part 1 and 2
http://www.youtube.com/watch?v=ai8WZWYuNuU
http://www.youtube.com/watch?v=4YsrZDmnONk

Seeing these guys run when the $hit hits the fan is always the fun part.