47 Seconds Castle : Season 4 Episode 19
TV-14 ABC 43m int(0)
Aired: March 26th, 2012 @ 9:00 PM EST on ABC
When a bomb explodes at a protest rally killing five people, Castle and Beckett realize the key to solving the case is to reconstruct the 47 seconds prior to the explosion. Using video and witness accounts, they uncover the shocking truth about who planted the bomb.