PARENTHOOD (Mitchell Haaseth/NBC)

GREY’S ANATOMY, Thursday, 9 p.m., ABC (ABC)

Betty White mischief

Still working, Betty White, 89, is in a class by herself. When she was propelled by a Facebook campaign to host “Saturday Night Live,” it was great fun. Now, she’s everywhere. This week, it’s a Hallmark movie called “The Lost Valentine.” In the drama, a TV reporter’s (Jennifer Love Hewitt, above center) love life is impacted by her assignment to profile a woman (White) whose love for her husband remains as strong as when she last saw him shortly before he was declared MIA during WWII.

* The Lost Valentine

Today, 9 p.m., CBS

A house divided

Kristina (Monica Potter, above) refuses to accept Haddie’s (Sarah Ramos) relationship with her boyfriend and Haddie moves in with her grandparents. Sarah (Lauren Graham) puts her foot down at work and demands a higher salary to pay for her daughter’s tuition. Julia (Erika Christensen) throws a bachelorette party for Jasmine (Joy Bryant) welcoming her to the Braverman tribe, while Adam (Peter Krause) gets more than he bargained for during a meeting with Crosby (Dax Shepard), shocking the entire family.

* PARENTHOOD

Tuesday, 10 p.m., NBC

Master thespian

Sheldon (Jim Parsons) hopes acting lessons from Penny(Kaley Cuoco) will help him become a better teacher. Meanwhile, Koothrappali (Kunal Nayyar) fantasizes about his best friend’s girlfriend. Co-starring Johnny Galecki.

* THE BIG BANG THEORY

Thursday, 8 p.m., CBS

Secrets come out

Poor Susan (Teri Hatcher). She discovers that some of her best, sexy Internet show moves are being copied by a competitor; Gabrielle (Eva Longoria) hires a private detective; Lynette (Felicity Huffman) is stunned when Tom’s doctor prescribes a rather unorthodox remedy for his depression; and Renee (Vanessa Williams) invites a reluctant Bree (Marcia Cross) to go clubbing with her to engage in some local man-hunting.

* DESPERATE HOUSEWIVES

Today, 9 p.m., ABC

Cupid’s bent arrow

It’s Valentine’s Day and Jules (Courteney Cox) wants nothing more than for Grayson (Josh Hopkins) to open up to her about his feelings. Co-starring tk.

* COUGAR TOWN

Wednesday, 9:30 p.m., ABC

Dark and twisty

Nose to the grindstone, Derek (Patrick Dempsey) breaks ground on his Alzheimer’s clinical trial and Meredith (Ellen Pompeo) feels left out (Is she going to get all dark and twisty again?). Callie and Arizona must navigate their pregnancy together, which starts off with Callie driving her new obstetrician bananas.

* GREY’S ANATOMY

Thursday, 9 p.m., ABC