Nyssa is back on Arrow Season 3 Episode 4! Oliver and Roy, meanwhile, are all about rebuilding their relationship with Thea.

Nyssa believes that Sara was killed by an arrow. She wants to see the body immediately. Oliver tells her she buried her in her grave from seven years ago.

Oliver goes to visit Thea. She has investors who are going to try to help her buy back the Floundry from Queen Consolidated. Oliver is trying to figure out why Thea is so different. She suggests he just be a big brother instead.

Flashback to Hong Kong. Oliver is a hired gun for Amanda.

Laurel is at Sara's grave when Nyssa arrives. Laurel doesn't want Nyssa's condolences or those of her father. The two have words. Unpleasant, at that.

Oliver follows Nyssa. He asks for her help. Nyssa isn't hiding in elite safe houses as Oliver suggests, but she's in Sara's for when she visited Starling. Nyssa informs Oliver Malcolm is alive.

Nyssa says the notes are in ghost ink, what the League uses. Malcolm no doubt gave Oliver's dad his notebook.

What did Sara tell Det. Lance? How are they going to find out without telling him she's dead?

Laurel tells Lance Sara called and told her she was looking into Jansen. The father and daughter lie to each other as they dance around the topic of Sara. Nyssa is there and Laurel wants to keep Sara's death a secret. Nyssa decides to play along.

Team Arrow and Nyssa go to Jansen's place. He was bankrolled by Malcolm Merlyn years ago. 

Laurel is disgusted that Oliver let Malcolm live. He reminds her he's no longer a killer. Nyssa goes to talk to Laurel while Oliver flashes back to being a killer.

Nyssa agrees with Laurel that Oliver should have killed Malcolm. Nyssa seems impressed with Laurel's blood lust.

Roy goes to see Thea. Does she want some help with reopening the club?

Oliver and Diggle agree not to tell Nyssa where Malcolm is. He's not there anyway and arranges a meet in a public place.

Malcolm assures Oliver he is a killer, but he was in town looking after Thea. She didn't make it out of the Mirakuru mess on time and Oliver was busy being The Arrow and not looking after his sister. Malcolm swears on Thea's life he didn't kill Sara.

Thea lies to Oliver when he asks about Malcolm. She thanks Oliver for telling her Malcolm is alive. 

Oliver tells Nyssa he believes Malcolm because he swore on his daughter's life. They disagree over allowing him to live. Diggle stops Oliver from going after Nyssa because he believes the world would be a better place without Malcolm Merlyn in it. Roy nods in agreement.

Another useless Hong Kong flashback.

Nyssa captures Thea.

Malcolm goes "home" maybe and calls Thea. She's not there. He sees a smoke signal calling Malcolm. At the same time, Laurel tells them what she learned about the League's way of communicating.

Laurel reminds him Malcolm is a killer.

Nyssa is at the spot with a Thea, trussed up and hanging like a bat. They're battling verbally about their fathers. Oliver arrives and cuts Thea down. The two fight and then Malcolm comes in. Nyssa is pinned to a tank and she begs Oliver to kill her. Malcolm tells Nyssa it was her father who killed Sara.

Blah blah blah, Malcolm says. No prison can hold a League trained assassin. He has one option. Kill him or... and Malcolm walks away.

Good God. Oliver puts Malcolm under his protection now. 

Amanda wanted to blow up an entire plane to take down one woman. Chin na Way. That was the plane that Oliver saved on the island.

Nyssa and Laurel come to an understanding.

Lance calls Sara.

Oliver visits Thea. She's been kidnapped before. No biggie.

Thea offers Roy an assistant manager position. Purely platonic.

Malcolm calls. She assures him Oliver is completely in the dark. He promised her she would never let anyone hurt her.

Nyssa goes to see her father, kneels before him. She tells him the truth about Malcolm. She tells him about Sara. She vowed a blood oath to avenge her. Daddy says Sara was never truly one of them.