Castle is all-new tonight Monday, March 26, 2012 at 10 p.m. ET on ABC with Season 4, Episode 19: "47 Seconds," and you have been warned: It's going to be explosive!

Not only are Richard Castle and Kate Beckett tasked with the job of piecing together the 47 seconds leading up to a deadly bombing in New York's Boylan Square, but they must also relive the seconds immediately following Beckett's shooting last season. Click here for all the super-spoilery sneak peek clips!

Guest starring in the episode are Christine Woods, who plays a young reporter present at the time of the bombing, and Tim Guinee, a key witness. 


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