Five-0 must work with rogue MI-6 agent Harry Langford to find a terrorist planning to cause nuclear reactors across Europe to meltdown. Also, McGarrett and Danny ask retired FBI profiler Alicia Brown to help them find their serial killer vigilante.
Warren and team encounter the sole inhabitant of a strange town; Murphy begins a new mission.
The BAFTA-award-winning talk show returns. Among the guests on Graham's sofa tonight: actor and musician Justin Timberlake and Oscar-nominated actress Anna Kendrick, co-starring in new animation Trolls; versatile British actor Daniel Radcliffe; and musical star Robbie Williams, who performs his new single.
Liv lands a small part on the hit show "Linda and Heather," but her role turns out to be bigger than she could have ever imagined. Meanwhile, Joey has to deal with his relationship woes.
Mariah campaigns to turn the city and the police against Luke, and not even Misty or Claire may be able to save him.
In the aftermath of a chaotic event at a favorite Harlem hangout, Luke heeds the call to action -- and hits Cottonmouth where he'll feel it most.
A double sluice and lack of divers mean that Emily Riedel must confront her deepest fear if the Clark is to succeed. Shawn "Mr. Gold" Pomrenke discovers the land sale of a lifetime.
Cottonmouth strikes back at Luke by taking his vengeance out on the people of Harlem, while detectives Knight and Scarfe face an unexpected threat.
A middle-class husband and wife put their lives in jeopardy carrying out a dangerous assignment.
Because of an armed intruder, after a home invasion, a married couple's life is turned upside-down.
Luke is pulled deeper into the fight for his neighborhood when, as a favor to an old friend, he tries to help a kid who's in trouble with Cottonmouth.
Luke gets closer to the truth about Reva and her part in his fate, while Mariah wrestles with the morality of her new role. Misty hunts for Luke.
When Bishop Egan denies Tomas permission to perform the exorcism on Angela's daughter, Father Marcus breaks out of Saint Aquinas and joins forces with Tomas, though he urges him to get his ex, Jessica, out of his life and heart. The Rance family's relationship with the demon deepens and when Marcus catches Angela stealing holy water, he instructs her on how to use it. On Chicago's south side, a series of bizarre ritual killings begin taking place.
After Cottonmouth and Scarfe's bloody clash, Luke realizes that saving the community may turn former allies into enemies, and enemies into allies.
Romantic alliances fray and conflict in the suburban home reaches a boiling point.
As he rescues a victim of Cottonmouth's vengeance, Luke remembers his earlier life and the conspiracy that led to his superhuman strength.
Mariah's political career comes under fire, and Cottonmouth picks up information that could put Luke on the run.
Finally a resolution but not before chaos, surprising disclosures, police and guns come into play.