Island. The ninjas have automatic weapons and a tent, into which Oliver is dragged. A pleasant man has Oliver sit on a wooden chair and does the usual "I do apologize for my men's treatment of you" routine that's supposed to make him seem urbane and charming. His name is Edward Fyers. Oliver says who he is and that his family has lots of money. Mr. Fyers is not interested in the huge ransom he could get because he's got this picture of what appears to be a gentleman in the Chinese army. It's the Archer! Oliver tries to claim he doesn't know who it is. But he is not a good liar (which seems like it's supposed to parallel the inevitable scene where he beats the lie detector). Fyers says the island is named "Purgatory" but that he can make it feel like Hell. Fyers leaves and a guy with a half-black-half-white ninja mask comes in. He's got a katana on his back. Look, just Google "Deathstroke." It's that guy.
Back to modern day. Thea sits on the porch and Oliver (calling her "Speedy") asks her to get a keg moved closer to the house. Then the both of them drop the subject entirely. There are people setting the party up, so they're probably being paid to move the keg. Thea's still whiny about the time Oliver said he'd see her "in a few days" and got shipwrecked and marooned for five years. She really took that personally. She's also thinking he might be the vigilante, since he's been weird and distant since he got back to Starling City. And she points out that he gave her an arrowhead as a souvenir. Also, all the mysterious running around he's been doing. She says, "I can't lose you again."
Moira has been summoned to meet John Barrowman. She assures him that her son is not the vigilante targeting the List. He's not convinced. She says Detective Lance has a vendetta against her family, which also seems to worry John Barrowman.