Extended Arrow Season 5 trailer reveals new friends and foes The CW has released an extended Arrow Season 5 trailer featuring a ton of new footage from the upcoming episodes and teasing Oliver’s new allies and enemies. Check it out in the player below! Titled “Legacy,” the Season 5 premiere is officially described as follows: “After Laurel’s death and the departures of both Diggle and Thea from Team Arrow, Oliver takes to the streets solo to protect Star City’s citizens as the Green Arrow.