Injuries threaten to send two castaways home before the first challenge is finished. (HDTV)

Patrick insists on helping Cho investigate when a member of Cho’s former gang is found murdered. (HDTV) TV-14

Dylan and Beth are given a challenging pro-bono case involving a female tennis star who loses her scholarship; Malcolm and Liam are pitted against each other. (HDTV) TV-PG

The doctors treat dozens of people when the roof of a romantic restaurant collapses on Valentine’s Day; Meredith struggles with her new duties as the chief’s wife. (HDTV) TV-14

Naomi refuses to take part in planning Maya’s wedding; tensions rise between Sam and Addison; Pete and Cooper treat a teenager with a mysterious bite mark. (HDTV) TV-14

Jeff tries to fix his relationship with Britta following a drunken phone call; Annie and Shirley make plans to humiliate Chang in order to defend Troy and Pierce’s dignity. (HDTV) TV-14

Leslie and Justin reunite her mother with an old flame for Valentine’s Day; Andy’s band is nervous about playing a gig at the Senior Center. (HDTV) TV-PG

The Sabre CEO (Kathy Bates) visits the Scranton office and says either Michael or Jim must go back to being a salesman; Andy’s Valentine’s Day plan backfires. (HDTV) TV-PG

Liz schedules a root canal to avoid feeling lonely on Valentine’s Day; Jack woos an attractive and successful TV host; Jenna’s stalker loses interest. (HDTV) TV-14

Jim makes a request that leaves Michael feeling defensive and insecure; Pam works on the guest list for the wedding; Toby and Dwight go under cover to investigate a workers’ comp claim. (HDTV) TV-PG

The news breaks that not everyone will be getting a raise; Dwight reaches his breaking point with Jim; Pam wants cash instead of wedding gifts. (HDTV) TV-PG

The Jeffersonian team investigates when the mutilated remains of a chicken farmer are found near a river; the case prompts Angela to launch an animal-rights campaign. (HDTV) TV-14

A young addict ‘s regression episodes send Kate and Price to Florida to investigate a violent crime. (HDTV) TV-14

Stefan helps Bonnie and Elena out of a hazardous situation; Jeremy invites Anna to a party in the woods. (HDTV) TV-14

Castiel helps Dean and Sam find Cupid after people start killing each other for love on Valentine’s Day. (HDTV) TV-14