Supergirl and the team go head to head against Rama Khan and Leviathan. Meanwhile, Lena and Lex must join forces when Project Non Nocere fails, leaving the two siblings in…

Supergirl realizes that in order to stop Lex and Leviathan she must work with the one person she never thought she’d trust again – Lena. Nia keeps dreaming about Brainy…

Lex tasks Supergirl with protecting Andrea from an anti-tech extremist, but his nefarious purpose goes beyond merely keeping Andrea alive. Meanwhile, Lena moves forward with Non Nocere, with Lex’s help.

Though Nora tries her best to keep Brody at bay, she can’t help but feel the long lost connection between them, and Justin reaches out to a homeless vet reluctant…

The Walkers’ plans to celebrate Valentine’s Day go horribly wrong when Tommy tells Sarah about another secret that Nora has kept buried since they were kids, and Saul’s hopes for…

The Walkers are excited when Tommy comes down for a visit, but his new girlfriend’s enthusiasm for Walker family history rubs the family the wrong way.

When a man is found dead in an industrial cake mixer, Castle and Beckett trace the murder to an Irish gang in Staten Island and a beautiful bar owner named…

Holmes and Watson consult on a case in which a man suspected of murdering his wife years ago receives a ransom demand for her safe return. Meanwhile, Lestrade overstays his…

Reese and Fusco get caught in the war between the two newest POIs, rival crime bosses Elias and Dominic. Also, a tantalizing clue to Shaw’s whereabouts leads Finch and Root…

Reese and Finch scramble to protect a software CEO when his behavior becomes increasingly erratic following a hacker attack that reveals all his secrets and unravels his life.

Samaritan launches a cyber-attack on the stock exchange, forcing the team to risk their lives in a desperate mission to stop a global economic catastrophe.

Samaritan shows its power by erasing crime from the city for a day in an attempt to force The Machine out of hiding.

Reese must save Elias from the Brotherhood. He can’t get any help from Root or Shaw since Shaw’s cover is blown and Root is escorting her to underground.

Reese volunteers as an NYPD police academy instructor in order to keep an eye on a talented young officer whose suspicious actions make him question her motives. Meanwhile, Martine –…

While Reese is forced to go to counseling for his violent tendencies, Root, Shaw and Finch try to help a new POI.

Forced to take on new identities provided by Root, the team members try to adapt to their new lives. However, some find it hard to ignore The Machine’s numbers, which…

Bull hires an eccentric attorney to represent him when a celebrity sues him after his advice regarding her custody case backfires.

Supergirl helps Winn face his greatest fear. After Alex sets out to find evidence against Lex, Brainy must decide between helping his friend or continuing to secretly work for Lex.

The subsequent complications from the Crisis leave Supergirl to face a chaotic threat.

Supergirl’s struggle against Leviathan reaches a boiling point as she faces off against Rama Khan. Meanwhile, as Lena and Hope work to launch Project Non Nocere, Hope proves to be…

Supergirl finally learns the truth about Lena while tangling with Leviathan. J’onn J’onn makes a discovery about his brother’s whereabouts.

Benson and Stabler investigate a tutor after a student is beaten and sexually assaulted, but their investigation soon leads them to another student.

Don and Peggy are faced with life-altering decisions

In the midst of a crisis, Don runs into an old friend.

Sterling Cooper Draper Price employees resort to scuttlebutt after an agency wide meeting is called.

An unannounced visitor at the Francis home rattles Betty.

Joan and Peggy deal with high-jinx in the office.

Peggy clashes with her new creative partner; Don pitches under unusual circumstances.

Don and Pete disregard Roger’s plans in order to land a new client.

An edict from Roger and Lane puts Pete in a personal dilemma.

The agency’s Christmas party is nearly spoiled by the late arrival of a surprise and not-so-welcome visitor.

Tony attempts to repair the rift between New Jersey and New York. A.J.’s depression struggle continues. A New York associate crosses the line with Meadow.

Phil Leotardo seeks to continue a cycle of retaliation between the New York and Jersey families. Christopher wrestles with his addictions. Tony decides keeping Carmela occupied with the spec house…