We've already shown you the most important seven seconds from Monday's episode of Castle.

But every scene on "Knockdown" is vital to Beckett, as things get personal for this detective on the upcoming installment of this ABC hit. She'll discover new intel regarding her mother's murder, as evidenced and teased in the clip below.

Warning to police in the area: get in your car. Shots are about to be fired...

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.