Jason Diablo

In the aftermath of Oliver's fight with Ra's al Ghul, Diggle and Arsenal continue to protect the city in the Arrow's absence. However, after three days without hearing from Oliver, they begin to fear the worst may have happened to their friend. Felicity refuses to believe that Oliver could be dead until Merlyn pays the team a surprise visit. Thea suspects there is something more behind Oliver's disappearance and asks Merlyn for a favor. Meanwhile, Ray tests a part of his new suit and Laurel takes up the mantle of the Black Canary.

An emotional and familiar case hits home for Broyles; Olivia reunites with Henry to enlist his services on a covert mission to return home.

Clark returns to Smallville from the Fortress and tells Lana that Kara (recurring guest star LAURA VANDERVOORT) is gone. Clark tells Lana they should team up to bring Lex down, so she gives him all the information she's gathered so far, including a report on a man named Adrian (guest star Tim Guinee -- "Ghost Whisperer," "Without a Trace," "Broken English"), who was infected with an alien substance. Adrian secretly plants a bomb on Chloe and tells Lois if she doesn#t get Lex to admit the truth about his experiments with 33.1, he will detonate the bomb. Chloe, thinking she is about to die, confesses to Jimmy (Aaron Ashmore) that she is a meteor freak.