VIDEO: Sneak Peek - 100th Episode of ABC's CASTLE

ABC's CASTLE celebrates its 100th episode on Monday. In the special episode titled "The Lives of Others", Castle finds himself in the unfortunate position of NOT being able to work a case. While he's holed up in the loft with a broken leg, Beckett goes off to investigate the death of an IRS agent without him, leaving Castle miserable and bored.

But when he thinks he witnesses the murder of a young woman in the apartment across the street, he is thrown into a "Rear Window"-esque murder mystery that hits much too close to home, on

The 100th episode of CASTLE airs Monday April 1st on ABC. Get a sneak peek below!