Source: MSN TV [follow link for complete column]
MSN TV: TONIGHT'S PICKS MONDAY, MARCH 26, 2012
10:01 PM, ABC
When five people are killed by a bomb at a protest rally, Castle and Beckett (Nathan Fillion, Stana Katic) interview witnesses and study video footage to reconstruct the 47 seconds before the explosion. The identity of the bomber shocks them both in the new episode "47 Seconds." Tim Guinee and Christine Woods guest star.