David Lyle

Oliver encounters a mysterious woman, Helena Bertinelli (Jessica DeGouw), with whom he can finally be himself, but soon comes to realize she's hiding dangerous secrets of her own.

As Oliver and Helena grow closer, he trains her to be his ally—to Diggle's dismay. But when her quest for revenge is too strong for Oliver, all hell breaks loose.

Pritchard must hide his history with Wally, the parole officer who is dating his daughter, Helen, when it is discovered that Wally is being coerced by a prisoner orchestrating an escape; Otto observes the anniversary of his parents' deaths.