Star Wars is a famous sci-fi film series.
Addison revealed to Derek that for her prom, she went out with Skippy Gold, who spoke about Star Wars all night. ("Losing My Religion")
Bailey and a patient spoke about Star Wars and the big picture while he was encased in cement. ("Freedom, Part 1")
After Meredith forgave Derek for fighting with her, Derek said to Meredith I love you and she replied I know. The idea was taken from Star Wars. ("Stand By Me")
While using the Da Vinci Surgical System, Bailey made lighsaber sounds. ("Here's to Future Days")