The TVLine-Up: TV Worth Watching This Monday

On TV this Monday: Whitney Houston makes her acting debut, nun’s the word for House‘s Dr. Chase, how Barney Stinson met his match, the Smash showdown heats up and more. We’ve boiled down tonight’s many offerings to a dozen to keep on your radar.

8 pm The Bodyguard (Lifetime) | Revisit Whitney Houston’s acting debut, as a pop star who requires the protection of a former Secret Service agent (played by Kevin Costner). (Find more Whitney-related programming here.)

8 pm House (Fox) | In a Jesse Spencer-centric episode, as Chase treats a cloistered nun on the verge of making life-changing vows, they form a unique connection that tests their faith and reason. (Get more scoop.)

8 pm Gossip Girl (The CW) | On Valentine’s Day, Blair can’t resist playing cupid for someone she loves, Georgina stirs up drama by crashing Nate’s party and Serena is shocked by something she witnesses. (View photos!)

8 pm The Voice (NBC) | The blind auditions continue! Hey, maybe tonight Christina will be called upon to remember Pink from their “Lady Marmalade” video?

8 pm How I Met Your Mother (CBS) | Kevin and Robin discussing taking their relationship to the next level; Barney meets his match in Ugly Betty alumna Becki Newton. (Watch exclusive video.)

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9 pm The Lying Game (ABC Family) | Discouraged by Dan’s inability to crack the case, Emma takes it upon herself to find a way to vindicate Ethan, who while in hiding with Sutton lowers his guard; Alec questions Rebecca’s motives after she agitates Ted and Kristin.

9 pm Being Human (Syfy) | Aidan and Suren’s love affair heats up; Sally gets entangled in her own romantic triangle. (Read about Being Human‘s Season 3 renewal.)

9 pm BET Honors 2012 (BET) | In this pre-taped event, Gabrielle Union hosts as honors are paid to poet/author Maya Angelou, Stevie Wonder, Mariah Carey, Spike Lee and others. Performances include Aretha Franklin, Patti LaBelle, Jennifer Hudson and Kelly Rowland.

9:30 pm Mike & Molly (CBS) | When Mike forgets to make dinner reservations for Valentine’s Day with Molly, he gloms onto Carl’s elaborate plans with Christina.

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10 pm Castle (ABC) | In the opener of a two-parter, Castle and Beckett are joined on the case by a CIA agent (guest star Jennifer Beals, The Chicago Code) with whom Rick has a, um, “complicated” past. (Read preview!)

10 pm Smash (NBC) | Wannabe Marilyns Ivy and Karen jump through hoops for director Derek Wills; Eileen fights to finance the musical in the midst of her acrimonious divorce.

10 pm Hawaii Five-0 (CBS) | When Five-0 nearly causes an international incident, the lieutenant governor calls for a team member’s head. (Get more scoop on the episode here.)

Which of the above is must-see for you? Also, hit Comments to offer your own tune-in suggestions.