Arrow Season 3 Spoilers: What Happens When Oliver and Nyssa Team Up Tonight?

Season 3 of Arrow continues tonight with the fourth episode, "The Magician," which will team Oliver with Nyssa as they hunt for Sara's killer. Of course, things won't go smoothly when the Canary's two former lovers join forces.

"There's an opportunity for them to work in concert, but Oliver's methods and Nyssa's methods don't match up," Stephen Amell told TVLine. "She's the, 'Shoot them all, figure it out afterwards [type],' and Oliver's like, 'I used to be that way! I'm not anymore.' So that creates the conflict for them."

"Oliver feels very much as though it's his responsibility to bring whoever did this to justice," Amell continued. "And I will say that of all of the convoluted, devious plans that we've ever had on the show, the 'Who killed Canary?' device is right at the top."

The actor also revealed that Nyssa, played by Katrina Law, "leaves [Episode] 4 as a ticking time bomb, and Oliver leaves with a whole host of new enemies." Could one of those enemies be Nyssa's father, Ra's Al Ghul? Amell teased that Ra's first appearance could come soon and that it would be memorable. "If you're a fan of comics, you're really going to enjoy the reveal of Ra's al Ghul - like, the first frames of seeing him," he said. "That's going to be pretty cool and create a lot of chatter."

The prime suspect in tonight's episode is Malcolm Merlyn, and both Oliver and Nyssa will set their sights on him. Amell promises a major scene between the two, who have not seen each other since the Season 1 finale. "We had 200 extras there," he said. "It is a costume-less, weapon-less, fisticuffs-less exchange. Concurrently, it's probably the most charged exchange that we've had in the show."

John Barrowman, who plays Malcolm, said he thinks the Dark Archer "has always loved Ollie like a son," an idea he "kind of tried to plant with these little nuances. So this time when we do meet, Malcolm has something to say to him, and it's not about fighting. It's very interesting what he has to say and how he says it. I think it's also a bit of a surprise for Oliver."

Malcolm hinted to Thea in the last episode that trouble would ensue if "someone" were to learn he were still alive. He more than likely meant Ra's, with whom he has a history in the League of Assassins. "He's concerned about Ra's being here, but he's not stupid," Barrowman said. "He will try to figure a way to protect himself and, hopefully, those around him."

What do you think will happen in tonight's episode? Let us know in the comments section.