The plot of the episode wasn’t changed by Tommy and Roy turning up, but the emotional stakes felt even higher as Oliver turned his back on the people he loved and jumped back into the fight.
Tommy and Roy were among them, despite the fact that neither Colin Donnell nor Colton Haynes returned for the 100th episode.
Oliver saw plenty of Moira, Robert, and Laurel throughout his time in the hallucination world, but it wasn’t until he was on the verge of returning to reality that he turned around and saw a ghostly crowd of his friends and family urging him on.
Marc Guggenheim’s reveal to ComicBook.com that a visual effects team combed through a ton of footage to find the perfect versions of Tommy and Roy to insert into the scene is proof that the whole Arrow crew was dedicated to turning Episode 100 into something truly special for fans.