Castiel calls on the Winchesters to help when his army of angel followers are attacked, and Dean is all too eager to help under the First Blade's influence.
Oliver attempts to protect his family after Slade launches the next stage of his plan for revenge for Shado's death and Oliver's betrayal. However, one of Oliver's team questions whether Oliver is seeing clearly. Meanwhile, Isabel schemes to take control of Queen Consolidated.moreless
After receiving some shocking news Stephen attempts to restore order in both his worlds by striking a deal with Jedikiah.
Cara and Russell contend with a new break-out and must also deal with an ULTRA trap.
Meanwhile Jedikiah is closer to developing a secret technology that could change his future.
Bronze Tiger escapes from prison and goes after a prototype of Malcolm's earthquake machine. Meanwhile, Roy refuses to train with Arrow unless the vigilante reveals his true identity, Laurel is disbarred, and Thea tries to get Walter and Moira to reconcile.moreless
A.R.G.U.S. recruits Diggle to rescue Lyla, who has disappeared in Moscow following a lead on Deadshot. Oliver and Felicity volunteer to go with their friend, but run into trouble when Isabel insists on accompanying them. Meanwhile, Moira's attorney suggests that Thea stop dating Roy because it's hurting Moira's defense.moreless
When ULTRA's most wanted man Killian McCrane resurfaces after years in hiding Stephen enlists John's help in tracking him down. John agrees but changes his mind when he learn Killian isn't after Jedikiah as everyone first believed.
Stephen still wants to help but Cara explains the history between Killian and John: A history that brings back memories from John's past and forces him to do something he never thought he would ever do again.
Meanwhile Stephen's mom becomes suspicious of his whereabouts and activities placing him in an awkward position.
Dean has a surprise for Sam and Kevin: Crowley, locked up in the trunk of the Impala. While they try to track down the demons on Earth, Abaddon continues with her plan to rule Hell.moreless
Kevin calls in Sam and Dean when he hears Crowley inside of his mind. The brothers end up turning to Ajay, a Reaper, to help Sam with the second trial of the Tablet. Meanwhile, Naomi secretly visits Dean and gives him vital information, forcing him to seek out Benny's help.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
Infamous criminal Cyrus Vanch plans to take on The Hood to reestablish his reputation as Starling City's leading crime lord. Meanwhile, Oliver confronts his mother over the copy of the list that Walter found, and Quentin unintentionally endangers Laurel.moreless
A ruthless tracker is sent after Miles, and Nora has to make a difficult decision regarding a family member.
Dean goes to help Benny, who has run afoul of vampires guarding his Maker. Left alone, Sam thinks about his year of retirement, but is soon called back in when Dean calls him for help.moreless
Oliver learns that he is not the only person in Star City that is flying under the radar of the police. An assassin named Deadshot is targeting businessmen bidding on an energy project, and Walter is one of the men involved. Oliver has no choice but to turn to Detective Lance for help to protect his family while he taken on the killer.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
Lydia and Ruben investigate the death of a young nanny that appears to be a suicide, but first they have to find the children who had been in her care. Ben makes matters worse when he tries to intervene in the life of a prostitute with a 13-year-old daughter who is about to follow her mother's career path. Jessica Tang gets good news about the boy she shot, but Cooper still believes she should admit what really happened.moreless
Sam, Dean, and Bobby go on a hunting trip for the Jersey Devil, and get involved in a restaurant with tainted birdburgers.
A mysterious young man named Jake shows up in Chance Harbor and discovers that a lot has changed since his last visit. Faye, who he left behind long ago, has discovered that she is a witch and now plans to settle the score with the guy who broke her heart. To further complicate things, Jake sets his sights on Cassie, which upsets Adam and Faye.moreless
The Leviathan possession of Castiel has devastating consequences which leads Sam, Dean, and Bobby back to Sioux Falls, Meanwhile, Sam puts himself and Dean in danger as he begins to crack under intense pressure from Lucifer's mind games.moreless