In the Justice League animated series, Hereafter, Superman vanishes and all Batman could find is a piece of his red cape. Oliver, who is similar to Batman in many ways, finds Clark's red coat. Both Oliver and Batman refuse to believe Clark is dead although the other members of the Justice League are doubtful. In both cases, Clark is de-powered.
Oliver Queen's alias Roy Connor is a name made from the first name of two of his sidekicks; the original Speedy (Roy Harper Jr.) and the second Green Arrow (Connor Hawke). Roy Harper is Green Arrow's adopted son and Connor Hawke is his biological son.
The Season 8 premiere features a new set of opening credits with footage from the episode. It features Allison Mack moving up to second-billing. Erica Durance and Aaron Ashmore move up to third and fourth, respectively.
This is the first set of opening credits without Michael Rosenbaum and Kristin Kreuk.
The building used to portray the Black Creek LuthorCorp Facility in Montana is the same building used as a hospital in the Supernatural Season 2 premiere of In My Time of Dying (2006).