"Not gonna pretend there's not a difference between the three of us and the three of them. You know, the original three."
"But--spying on us? I mean, come on.
—Dinah and Curtis regarding Oliver spying on them and Rene
"Irreconcilable Differences" is the ninth and midseason finale episode of the sixth season of Arrow, and the one-hundred-twenty-fourth episode overall. It aired on December 7, 2017.


Quentin Lance is kidnapped by Black Siren and Cayden James, who are looking to trade Lance’s life for a weapon of mass destruction. Oliver and Team Green Arrow must figure out a way to save Lance while still keeping the city safe.[1]




Preparation ran from October 5 until October 16, 2017, with a break on October 9 for Thanksgiving. Shooting ran from October 17 until October 26, 2017.[2]


  • Charlotte Ross, Kirk Acevedo and Michael Emerson previously appeared in the Law & Order franchise.
  • Kirk Acevedo, Charlotte Ross and Tom Amandes all appeared on NYPD Blue. Acevedo and Amandes also appeared on Numb3rs.
  • Stephen Amell, Kirk Acevedo, Charlotte Ross and Johann Urb previously appeared in the CSI franchise.
  • Michael Emerson and Tom Amandes both appeared on The Practice and Parenthood.


  1. Arrow Spoilers: “Irreconcilable Differences” Description - GreenArrowTV
  2. Marc Guggenheim (@mguggenheim) - Twitter