'Castle'

Die-hard fans of this crime drama are a passionate people (I know some who get more than a little crazy over this show's season-ending cliffhangers). You can bet that the producers know this, so hang on tight. It looks like the season finale will take the Beckett/Castle (Stana Katic and Nathan Fillion) relationship to a new level with a "defining moment that will change their relationship forever." 10 p.m. Monday on ABC (seattletimes.com/tvlistings).

Doug Knoop, Seattle Times staff

dknoop@seattletimes.com or on Twitter @dougknoop

Also on Monday

"MLB Baseball," 7 p.m. (ROOT): Detroit Tigers at Seattle Mariners (Live).

"2 Broke Girls," 8 p.m. (CBS): Max and Caroline attend a fashion gala where Martha Stewart is a guest in an effort to have her try their cupcakes.

"Hart of Dixie," 9 p.m. (CW): Zoe feels responsible for not noticing warning signs as a friend faces a health crisis; Lavon encourages Wade to open up his own bar; Lemon tries to get her relationship with George back on track.

"House," 9 p.m. (Fox): The team must convince its patient that a missing House is still calling all the shots.

"Smash," 10 p.m. (NBC): A crisis hits Rebecca Duvall (Uma Thurman) as "Bombshell" is set to face its first audience; Frank is forced to adjust to Michael's return; Dev tries to reconcile with Karen.

"The Pitch," 10 p.m. (AMC): Two advertising agencies match wits to find the first tri-branded campaign.

The New York Times