Oliver is at home and can't get through the security on this Blackhawk thumbdrive that he stole. It's nice to know that he's got some weaknesses. Thea barges in and tells him that Moira is "hooking up with Tommy's dad." She's got supporting evidence: a couple of months before Oliver and his father went on their doomed voyage, Moira was chatting it up with Malcolm. Oliver is confident that she'd never cheat on either their father or Walter. Thea says she's a liar and a cheater, and that Oliver doesn't know her at all.
Castle Queen. Which I guess was where we were in the last scene. But now it's later, because Oliver has gone straight to Moira with Thea's accusations. He wants to know what was going on with Malcolm and why she was fighting with his father. She says that Robert cheated on her and that he wasn't the man that Oliver thought he was. And she wants to keep his image clean for Thea, so he's not allowed to tell her that. Oliver cautiously asks if she's seen Malcolm recently. She says she occasionally asks for advice, but that's it.
The island. Oliver is somehow still in the soldier outfit as they show him the cages. Then he gets whopped over the head, because he's obviously not a real soldier. Or a ninja.
Malcolm, Tommy and Laurel are at dinner. Malcolm tells a story about how Tommy once wanted a puppy that he could name "Arthur" because he's a "Merlyn." Aren't Tommy and Laurel super-close friends since childhood? She should know all this already. Anyway, the only reason this scene exists is so that we can learn that Malcolm's mother was killed before Laurel and Tommy became friends.
Felicity Smoak! She's in a server room full of blinking lights. Oliver tells her there's a scavenger hunt he's on and he gives her the security fob. A scavenger hunt? I kind of enjoy how lame his excuses are. He promises her some of the expensive wine he intends to win and she accepts this as somehow making sense. The fob is "PIN protected" and she says there's a military-grade cryptographic security protocol. Oliver claims that the idle rich are hard to entertain.
Now that their dinner's over, Malcolm wants Tommy to sign some papers to shut down his mother's free clinic. Tommy's hurt that the dinner wasn't about getting to know Laurel. Malcolm tells Laurel that Tommy's other taught him the world is a brutal place. I don't understand why Malcolm would need Tommy to sign off on closing the clinic.