The TVLine-Up: TV Worth Watching This Thursday

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On TV this Thursday: Valentine’s Day at 30 Rock and Seattle Grace could not be more different, girls get wild at a Secret Circle slumber party, the Swamp People return and more. As but a supplement to TVLine’s original features, we’ve picked nine programs to keep on your radar.

8 pm 30 Rock (NBC) | Double episode! Jack entertains his mother-in-law (guest star Mary Steenburgen, Bored to Death); Tracy and Frank try to help Lutz find someone to spend Valentine’s with; Criss and Liz can’t celebrate until they buy a table.

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8 pm The Big Bang Theory (CBS) | After Sheldon is forced to take vacation, he goes to work with Amy in her neurobiology lab; Bernadette tries to get Howard to sign a pre-nup.

8:30 pm Rob (CBS) | Rob asks Hector to teach him Spanish – in secret – so he can understand what Maggie’s family is saying about him. Let’s hope this turns out better than it did for Elaine Benes and her Korean manicurists.

Vampire Diaries‘ Candice Accola on Caroline’s Feelings for Klaus and Tyler’s Whereabouts

9 pm Grey’s Anatomy (ABC) | For Valentine’s Day, Callie surprises Arizona with a romantic evening, Derek and Meredith spend the night out and Ben proves to Bailey that he knows her better than she thinks. (But it’s not all fun and games — check out our first look video in this week’s Spoiler Alert.)

9 pm Person of Interest (CBS) | Finch grows concerned that the son of his former business partner is dangerously close to finding out about The Machine. The X Factor‘s Astro makes his acting debut.

9 pm The Secret Circle (The CW) | Faye, Melissa, Diana and Cassie enjoy a “girls only” anti-Valentine’s Day slumber party — but the night gets wilder than expected when Diana dabbles in “Devil’s Spirit.” (Get scoop and view photos!)

9 pm Swamp People (History) | Season 3 premiere: The next 30-day hunting season kicks off with a “Gator Gold rush.” (P.S. If you’re near NYC, Chelsea Market is converted into a makeshift swamp for the week.)

9:30 pm Up All Night (NBC) | When Ava and Kevin have an epic blow-out, Reagan and Chris find themselves wistful for relationship drama — and unintentionally end up creating some of their own. (Watch exclusive clip!)

Private Practice‘s KaDee Strickland Previews a ‘Raw’ Moment, Eyes Charlotte’s Own ‘Alt Reality’

10 pm The Mentalist (CBS) | Jane tries to prove a murder trial defendant has been wrongfully accused before time runs out. Diane Farr (Numb3rs) and Samaire Armstrong (Dirty Sexy Money) guest-star.

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

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