Team Arrow has a traitor in their midst. A new promo for "Irreconcilable Differences," the Season 6 midseason finale, teases a massive betrayal from a member of Oliver Queen's inner circle.
Oliver has been under a microscope since the first episode of Season 6, where Special Agent Amanda Watson launched an investigation into his possible connection to the Green Arrow. Ever since, she has been dogging both him and his team: Diggle, who has taken up the hood as Green Arrow; Rene "Wild Dog" Ramirez; Dinah Drake, aka Black Canary; Curtis Holt's Mr. Terrific; and Felicity Smoak, aka Overwatch.
Now, according to Quentin Lance, one of these team members has turned traitor. In the promo, Lance pulls Oliver aside at his wedding reception to inform him that a witness is willing to testify that he is Green Arrow. Word quickly spreads to the rest of the team, sparking suspicion all around. Nevertheless, it looks as though Oliver charges into battle with his team, though that may be his biggest mistake; the last shot of the promo shows him demanding to know where everyone else went.
The episode also looks to follow up on the events of "Crisis on Earth-X," this year's Arrowverse crossover. In the finale of the four-show event, Felicity and Oliver exchanged vows in an impromptu double wedding. As Diggle went to marry Barry and Iris, Felicity interrupted and asked Oliver to marry her right then and there. Oliver, of course, agreed without hesitation. Without any further ado, Diggle completed his part and announced both couples as man and wife.
“Irreconcilable Differences” – BLACK SIREN KIDNAPS LANCE – Quentin Lance (Paul Blackthorne) is kidnaped by Black Siren (Katie Cassidy) and Cayden James (guest star Michael Emerson), who are looking to trade Lance’s life for a weapon of mass destruction. Oliver (Stephen Amell) and Team Green Arrow must figure out a way to save Lance while still keeping the city safe. Laura Belsey directed the episode written by Beth Schwartz & Sarah Tarkoff (#609). Original airdate 12/7/2017.
Starring Stephen Amell as the Emerald Archer (well, not currently), Arrow airs Thursdays at 9pm ET/PT on The CW. The series also stars Emily Bett Rickards, David Ramsey, Willa Holland and more.