Kiera and an emotionally unravelling Carlos must stop Liber8 from committing a devastating chemical attack on the city.

When Alicia pays a visit to longtime client Colin Sweeney, she finds herself in the unwanted role of witness when a body is discovered in his home. Meanwhile, Eli steps in when an unfortunate picture of Zach threatens to become a public relations nightmare for Peter.

A chance encounter with a suspicious-looking individual leads Jane and Lisbon to uncover a vast human smuggling ring. Meanwhile, Lisbon remains tempted by Pike’s offer to move to D.C. with him.

A chance encounter with a suspicious-looking individual leads Jane and Lisbon to uncover a vast human smuggling ring. Meanwhile, Lisbon remains tempted by Pike’s offer to move to D.C. with him.

While Alison struggles with Aynsley’s death and Cosima grapples with the worsening symptoms of her mysterious sickness, Sarah enlists Art’s help to find Kira and is shocked when she learns where the trail leads.

While Alison struggles with Aynsley’s death and Cosima grapples with the worsening symptoms of her mysterious sickness, Sarah enlists Art’s help to find Kira and is shocked when she learns where the trail leads.

When Sherlock’s brother Mycroft makes a surprise return to New York, his motivations cause discord between Sherlock and Joan. Meanwhile, a missing person case takes Sherlock and Joan inside the world of unmanned aeronautics.

Bellamy leads his crew into Grounder territory as they search for Octavia. Raven can’t help but notice the deep connection between Finn and Clarke. Meanwhile, flashbacks reveal Bellamy’s and Octavia’s childhood on the Ark.

The family joins Phil as he travels to Australia to fulfill his mother’s wish that he see the land where he was conceived.

The Mirakuru sends Roy into an uncontrollable rage and he unleashes on the city. After Roy’s deadly fight with a police officer, Oliver realizes the Mirakuru has taken over Roy completely and must figure out a way to stop him. Things get more complicated after Sara declares that Roy is too far gone and the only way to stop him is to kill him. Meanwhile, Thea believes she can break through to Roy so she goes on camera at Moira’s campaign rally to lure him to Verdant. Her ploy works but after Roy attacks Thea, Team Arrow unleashes on him.