Ep 23. Unthinkable

Oliver Queen and Team Arrow face their biggest challenge yet as they go up against Slade Wilson and his army of Mirakuru soldiers in the season finale, "Unthinkable."

As the episode begins, Oliver is still reeling from the loss of his mother and struggling to find a way to defeat Slade, who has taken Felicity, Diggle, and Oliver's sister Thea captive. With the help of some unexpected allies, including a reformed Laurel Lance and a repentant Roy Harper, Oliver comes up with a plan to stop Slade once and for all.

The action-packed episode sees Oliver and his team engage in a brutal battle with Slade's men, with both sides taking heavy losses. Meanwhile, Slade taunts Oliver with visions of his past failures, trying to break him down emotionally. But with his friends and loved ones in danger, Oliver refuses to give up, and launches a daring attack on Slade's headquarters.

The episode also features several poignant character moments, with Oliver and Felicity finally confronting their feelings for each other, and Diggle grappling with the decision to take up his brother's mantle as the new Suicide Squad leader. The finale sets the stage for the next season, as Oliver faces new challenges and the long-brewing conflict between him and former friend-turned-enemy Malcolm Merlyn comes to a head.

Overall, "Unthinkable" is a thrilling and emotional conclusion to a season full of twists and turns. Fans of the show will be on the edge of their seats as they watch Oliver and his team fight for their lives, and for the city they love.