Apr 22, 13

Must-Watch Finales: Scoop on 39 Season-Enders

Warning: Spoilers!

Unlike Castle‘s previous two season finales, this year’s case, which involves a body found in a hotel water tank, has no direct connection to our heroes’ personal lives. But the episode will still pack an emotional punch once Beckett drops a bombshell. “They face the biggest challenge to their relationship that we’ve seen so far,” creator Andrew W. Marlowe says. “We find Castle and Beckett forced to confront the hard questions about what their relationship is based on and who they are. Questions start bubbling up, [like], ‘Where are we going?'” And the answers could impact everyone at the precinct. “The finale could potentially change everyone‘s lives forever,” Marlowe teases.