Wednesday night's episode of "Arrow" season 4 saw Oliver Queen (Stephen Amell) teaming up with his biggest nemesis Malcolm Merlyn (John Barrowman).
According to Fashion N Style, Oliver and Malcolm set their differences aside to take down an even bigger enemy Damien Dahrk (Neal McDonough).
In an interview with TV Line, Barrowman also talked about the big changes that will take place in the lives of Malcolm and Nyssa in the upcoming episodes.
There are some speculations that Nyssa will challenge Malcolm for the League of Assassins and she could die.
"All I will say to that is it's going to take a twist and a turn. Obviously, Malcolm was involved with the death of her father, so she has a bit of a grudge and she's very vocal about it. But she does something that is one of the episode's jaw-dropping moments, where people are going to be like, 'Oh my God...,'" he said.
Meanwhile, Barrowman also talked about Laurel and Thea's visit to Lazarus' Pit.
As of late, Malcolm is still unaware that the two characters will be reaching out to him.
"Malcolm doesn't know that they're going to waltz through his door, and when they do, a dilemma is put in front of him. There's his daughter, who he knows has been having some trouble and he didn't really want her going in the Pit in the first place," he explained.
In other news, Barrowman also dished on Thea and Malcolm's relationship in season 4.
According to him, Malcolm will become even more concerned and loving of Thea. Throughout the entire season, his character will also be willing to prove everything to get Thea back into his life.
"It's an unconditional, parental love. Malcolm just goes about it in a unique way!" he said.
"Arrow" season 4 airs Wednesdays at 8 p.m. ET on The CW.