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Promotional image of "Arrow" season 6.

In the next episode of "Arrow," Slade Wilson a.k.a. Deathstroke (Manu Bennett) comes face-to-face with his missing son Joe Wilson (Liam Hall).

The trailer for the upcoming installment titled "Promises Kept" was released just recently and showed Oliver Queen a.k.a. Green Arrow (Stephen Amell) warning Slade about the newly-discovered Joe. "Your son is dangerous," Queen tells Deathstroke as he contemplates what to do next. They find out that Joe is a relentless killer and gets rid of any witness to his crimes. He takes his sword and pierces a passerby who sees him in action. "The apple does not fall that far," Joe tells his father who is astonished by his son's cruelty. He points his gun at Deathstroke who cannot do anything at the moment. Joe and his thugs bring in an unfortunate surprise for Wilson as he sees Queen get pushed in the room.

The henchmen bring Queen to his knees like an offering to Wilson. Moments later, the captured Green Arrow is seated on a chair with his hands tied behind his back. Deathstroke raises his sword and points it at Queen while Joe observes from a distance. "[Queen] stands to collect a debt he owes you, father," Joe cunningly tells Wilson who is ready to stab the Arrow with his sword. It remains to be seen if Deathstroke will kill Queen or not.

In the last episode, Wilson enlisted the help of Queen to find his missing son Joe. They discovered that he was taken by a group of mercenaries who would not set him free. Therefore, Deathstroke decided to take on the mercenaries but later found out that their leader was actually his son. Wilson was caught in disbelief when Joe finally revealed himself.

"Arrow" season 6 episode 6 will hit the airwaves on Thursday, Nov. 16 at 10 p.m. EST on The CW.