The Royal Canadian Mounted Police enlist the help of ISIS to transport a captured Canadian terrorist. On a train.

As Meredith puts Zola to bed and falls asleep, she begins to wonder -- what if her mother had never had Alzheimer's and she'd had loving, supportive parents? The reverberations of a happy Meredith Grey change the world of Seattle Grace as we know it. What if she had never met Derek in that bar and he had never separated from Addison? What if Callie and Owen had become a couple long before she met Arizona? And what if Bailey never evolved from the meek intern she once was?

Episode info coming soon ..

Leslie works to find Ann a Valentine's date. Ron helps Ben with a scavenger hunt, and Chris becomes depressed over his love life.

The Machine gives Reese and Finch the number of a down-and-out man who has been pushed too far, and they're forced to turn to former Person of Interest Zoe Morgan for help.

Sheldon's selfish demands force Leonard to reconsider their friendship. Meanwhile, Wolowitz tries to pick his astronaut nickname.

Stephen unveils GOP super PACs' biggest donors, Newt Gingrich faces a copyright infringement lawsuit, and Christiane Amanpour examines Iran's political environment.

Episode info coming soon ..

Jane and the CBI narrow down the list of suspects after a disgraced clothing designer on the verge of a comeback becomes a fashion victim. Meanwhile, FBI Agent Darcy continues her investigation into finding Red John.

Jim returns from jury duty, only to have to deal with Dwight's pesky questions about the details of the case. Elsewhere, Angela and her senator beau welcome their baby.

Sheriff Forbes delivers some disturbing news to Alaric and Elena about the weapon used in a recent murder. In the Salvatore brothers’ escalating quest to kill Klaus, Stefan turns to Bonnie and Abby, while Damon reaches out to an old acquaintance for help in setting up an elaborate plan. Intent on a plan of his own, Klaus hosts a strange dinner party, where he reveals another story from his family’s violent past until an unexpected guest brings the party to an end. Meanwhile, Caroline is heartbroken when she is unable to stop a tragedy from unfolding.