In the next episode of "Arrow," someone in the team is going to testify that Oliver Queen (Stephen Amell) is the Green Arrow.

The trailer for the upcoming installment titled "Irreconcilable Differences" was released just recently and showed Queen and Felicity Smoak (Emily Bett Rickards) at their wedding reception and enjoying the festivities with their friends. As Smoak tosses the bouquet of flowers over her head, all the women try to outdo one another in order to catch it. Meanwhile, Quentin Lance (Paul Blackthorne) shows up at the reception and tells Queen, "We got a problem. There is a witness who is willing to testify that you are the Green Arrow." The hero then asks who that person might be. "Someone on the team," Lance says with concern. Queen is caught by surprise because it signals a betrayal from someone within the team.

"It could literally be anyone of us," Curtis Holt a.k.a. Mr. Terrific says to the whole team which includes John Diggle (David Ramsey), Dinah Drake a.k.a. Black Canary (Juliana Harkavy), and Rene Ramirez (Rick Gonzalez). Diggle tells everyone not to get paranoid. This issue comes at a bad time when they have to go on a mission. However, Queen reminds everyone, "Whatever issues we have, let us put it aside and get the job done." It remains to be seen who among them is going to betray the Green Arrow.

In the last episode, Team Arrow went to Central City to help Barry Allen (Grant Gustin) and Team Flash defeat the villains from Earth-X. Queen and Smoak also decided to finally get married. Diggle officiated the impromptu wedding where Allen and Iris West (Candice Patton) were the witnesses.

"Arrow" season 6 episode 9 will hit the airwaves on Thursday, Dec. 7 at 10 p.m. EST on The CW.