Throw It In!: "Labyrinth Runners" is why Emily was spared from death at the end of the Galndus War arc, why she was made Adrian's apprentice: to build up to the reveal that she was his daughter.
What Could Have Been: Back during the discussions of adapting the canon episode, Gus was still going to play his part in its events until it was decided he would stay with Perry in Gravity Falls.
