A police program that monitors suspicious behavior is introduced and Vega tries to get Akeela's help in landing Dash a position as the program's analyst. Meanwhile, Vega and Dash suspect Arthur is up to something.moreless
Oliver's life is going smoothly for once... until the Huntress returns to town. Meanwhile, Thea gets Roy Harper at job at the new club just in time for its opening night, and Laurel and Quentin try to come to grips with Dinah's return.moreless
In the year 2036, Peter, Astrid, Walter, and Etta set out to find Olivia and free her from amber. Once they do, they discover she holds the key to finding the plans for a weapon to defeat the Observers... but Walter is captured and interrogated for the same information.moreless
Dean and Sam must search for three key items in order to defeat Dick Roman and the Leviathans. Their quest takes them to Crowley and the Alpha vampire, but the Leviathans will stop at nothing to kill the Winchesters and put their plan for global domination into effect.moreless
Rebecca and Doc are closer to finding the man who might be the key to finding the secrets behind the returning criminals. A discovery beneath Alcatraz brings Hauser closer to the truth.