BROOKLYN NINE-NINE: Det. Santiago, Sgt. Jeffords, Det. Diaz and Det. Peralta hang at the precinct. (Eddy Chen/FOX)

Tonight’s XXII Winter Olympics coverage (NBC at 8 p.m.) includes women’s freestyle skiing, women’s ski jumping, figure skating (pairs short) and snowboarding’s halfpipe event, in which Shaun White is vying for a gold medal in his third consecutive Olympics.

“Pretty Little Liars” (ABC Family at 8) goes back in time with a vision of Spencer’s life as a 1940s film noir as she searches for Ali and tries to find answers to her many mysteries.

Live from Madison Square Garden, the Westminster Kennel Club Dog Show (USA at 8) wraps up its 138th annual competition with the sporting, working and terrier group competitions, along with the crowning of Best in Show.

Schmidt and Nick play bar mitzvah crashers on “New Girl” (Fox at 9) just when Jess’s unpredictable sister unexpectedly shows up. Linda Cardellini guest stars.

RETURNING SHOW: After its first season went on hiatus in August, “Twisted” (ABC Family at 9) finally picks back up with the mysterious murder of Danny’s aunt solved, as is the identity of Regina’s killer.

The documentary “American Experience: Butch Cassidy and the Sundance Kid” (MPT and WETA at 9) explores the history behind the legendary criminal duo of the 1890s, whose exploits inspired the popular 1969 film starring Paul Newman and Robert Redford.

FINALE WATCH: The third season of “Shahs of Sunset” (Bravo at 9) concludes with Mike and Reza reaching an agreement about their partnership and Jessica running out of patience wating for Mike to propose.

Rosa and Amy enjoy themselves at the expense of a costumed crime fighter on “Brooklyn Nine-Nine” (Fox at 9:30) while Boyle is in hot pursuit of a new romance, but Jake steps in to keep him from moving too quickly.

Raylan is on a quest for revenge after Allison is attacked on “Justified” (FX at 10), and Boyd scrambles to protect Ava.

Molly’s on the hunt for a person who reportedly killed a famous basketball player on “Killer Women” (ABC at 10) while Dan receives a tip that leads to the arrest of an unlikely suspect.

Actress Scarlett Johansson stops by the “Late Show With David Letterman” (CBS at 11:35), with a musical performance from singer-songwriter John Grant.

Actor Gary Oldman is on “Jimmy Kimmel Live” (ABC at 11:35), with music from Crosses.

— Rachel Lubitz