The TVLine-Up: TV Worth Watching This Monday

On TV this Monday: Llanview starts saying goodbye, the Liars discover their tormenter is not acting “A”-lone, a murder threatens to crash a Castle wedding and more. Here are eight programs to keep on your radar.

2 pm One Life to Live (ABC) | It’s the beginning of the end, as the 43-year-old sudser kicks off its final week. (Get some scoop on Friday’s finale.)

Hot for Winter: Your January Premieres, Returns and Finales Calendar

8 pm The Bachelor (ABC) | The remaining bachelorettes travel to Ben’s hometown in the Sonoma, Calif. vineyards, where two lucky ladies get one-on-one dates. During the group date, as the women audition for and perform in a child-written community theater production, expect “drama and uncontrollable tears.”

8 pm Pretty Little Liars (ABC Family) | After enlisting Caleb’s hacking skills to help with their quest, the Liars find out “A” is not acting alone and his/her “helper” may be closer than they think; Aria and Ezra must deal with the aftermath of coming clean.

8 pm How I Met Your Mother (CBS) | It’s a bit of a slow night, so we’ll point out this repeat of Punchy’s wedding, featuring Drunk Marshall at his finest (as he and Lily try to hide her pregnancy), a montage of Ted’s crying, embarrassing toasts and Robin and Barney busting serious moves.

2012 Renewal Scorecard: What’s Coming Back? What’s Getting Axed? What’s on the Bubble?

9 pm The Lying Game (ABC Family) | Emma can’t escape the fact that her twin may be gone for good; Rebecca tries to help Char when her mom, Phyllis, has another drinking “episode.”

9 pm WWE Monday Night RAW (USA Network) | After teasing his return last week; Chris Jericho’s next move is revealed; Kane resumes his unfinished business with John Cena.

9 pm Fear Factor (NBC) | Contestants, bound and locked in cages, are submerged underwater while their teammates dive in to free them. At the Fear Factor Food Truck, teams eat live cockroaches and giant grasshoppers with a side of rat hair chips and maggot-topped salsa.

Will a Castle Wedding Make Kte and Rick Ready for Romance?

10 pm Castle (ABC) | When a lothario is killed, Castle and Beckett suspect that the victim’s mysterious double life holds the key to his murder. Their investigation leads to a shocking twist that threatens to disrupt Ryan and Jenny’s wedding. “It’s a fun episode,” says series boss Andrew H. Marlowe, “because some secrets are revealed about the Ryan/Jenny relationship that are a lot of fun, and of course we touch on the Lanie/Esposito relationship as well.” And Rick and Kate? Might they get ideas about finally acting on their feelings…? “Oh, I think that every time you have a wedding episode… it’s a chance for everybody to take stock of their relationship,” Marlow teases.

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