The divisions between the heroes is about to grow even wider in the next episode of Arrow, "Collision Course". A new promo shows the original trio squaring off with Curtis (Echo Kellum), Rene (Rick Gonzalez), and Dinah (Juliana Harkavy).

In last night's episode, "The Devil's Greatest Trick", Team Arrow had to unite against Cayden James (Michael Emerson) to stop a bomb from destroying Star City. After discovering that James was fooled into falsely believing that Oliver murdered his son, Team Arrow found evidence that proved James was set up by a member of his organization. After rounding up Black Siren (Katie Cassidy), Anatoly (David Nykl), and Diaz (Kirk Acevedo), a fight broke out and Oliver stopped the bomb. In the aftermath, Diaz revealed that he was the traitor and killed James.

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In the trailer for "Collision Course" (see the video embedded above), we see the characters are at odds over the fate of Black Siren. Diggle (David Ramsay) reminds Oliver (Stephen Amell) that going after a former teammate may be "a line we can never uncross." Oliver points out that "they crossed it first." A battle between the two teams appears imminent when Rene says "I do think that Oliver wants to fight." The promo ends with Dinah, Oliver, and Curtis readying their weapons for a dramatic clash.

Dinah's desire to seek revenge on Black Siren for the murder of Vigilante appears to be the driving force behind the conflict. Though Black Siren took credit for assassinating James' son, Oliver and the others believe that she was just pushing James' buttons. Meanwhile, Dinah is convinced of her guilt. What Dinah doesn't know is that Black Siren was rescued by Quentin Lance (Paul Blackthorne), who's desperate to find a connection with Black Siren. Quentin is perhaps the only character who is still able to see a potential for good in Black Siren. It's unclear if Oliver still thinks she's redeemable.

If Dinah were to harm Quentin, it could easily motivate Oliver to take up arms against Dinah and her team. When the two teams coming to blows, it will become ever more difficult for the heroes to put aside their differences and work together again. By the time this is over, Oliver may be forced to recruit new blood, or even old allies like Roy Harper (Colton Haynes), who is expected to return soon.

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Arrow continues Thursday, March 1 with "Collision Course" at 9pm ET on The CW.

Source: The CW