George Lucas’s Star Wars films are a cult phenomenon. They are referenced numerous times in the Buffyverse. The original trilogy included the movies Star Wars (1977), The Empire Strikes Back (1980) and Return Of The Jedi (1983) and the movies The Phantom Menace (1999), Attack of the Clones (2002) and Revenge of the Sith (2005) were made later on.

• In When She Was Bad, when Xander and Willow play Guess the Movie from the tag line (Willow: “Use the Force, Luke.”,
  Xander: “Do I even have to dignify that with a guess?”)
• In School Hard, Spike told Angel that, “You were my Yoda!” Yoda was the ancient Jedi master who became the mentor and teacher for both Obi-Wan Kenobi and Luke Skywalker.
• A visual reference to Star Wars can be seen in The Zeppo, when Xander runs into the corridor and runs back out with the gang members chasing him. Han Solo does the same thing in Star Wars.
• In Choices, Buffy says that Faith has turned to ‘the dark side’.
• In The Freshman, Xander confuses the Star Wars Jedi code quoted by Yoda in The Phantom Menace. (”Hate leads to anger…no wait…Fear leads to hate, hate leads to the dark side”). Also in that episode, the old frat house that the vampires are holed up in is the Psi Theta house. If you write those two greek letters together, and pronounce them together, you get Sith.
• In Fear, Itself, Xander says to Oz, “Sensing a disturbance in the Force, Master?”
• Buffy using the chain to choke Sobek the snake-demon in Shadow is reminiscent of Princess Leia killing Jabba the Hutt in Return of the Jedi.
• In Forever, Ben calls Glory’s minions “Jawa rejects” after the small hooded and robed creatures in Star Wars.
• In Life Serial, Andrew paints a Death Star from Star Wars on the side of the gang’s van. It’s the Empire’s revised design from Return of the Jedi, which Jonathan says is flawed.
• In the episode Two To Go, Andrew says, “We’ve got maybe seconds before Darth Rosenberg grinds us all into to Jawa burgers and not one of you bunch has the Midichlorians to stop her.” These are all Star Wars references: Darth is a title given to a Sith Warrior (such as Darth Vader); Jawas are the hooded creatures who live on Tatooine, and Midichlorians are micro-organisms which exist in all living things. Andrew says, “Laugh it up, Fuzzball” which is a quote from Star Wars. Andrew also later says in Two To Go, “…in a galaxy far, far away” - yet another Star Wars reference.
• In All the Way, Tara and Willow see a couple dressed as Princess Leia and Luke Skywalker kissing in the Bronze. Willow asks, “Do they know they’re brother and sister?”
• In Smashed, we see that the three nerds own a mint condition (though out of its packaging) 1979 Boba Fett action figure. Though Boba Fett was first introduced in The Empire Strikes Back (made in 1980), the earliest Boba Fett figure was made in 1979, before the film was released.
• In Dead Things, Jonathan and Andrew play fight with green light sabres.
• In Entropy, Warren calls Jonathan “Padawan”.
• In Conversations with Dead People, Jonathan and Warren have the following conversation: Warren: “Come on, “If you strike me down…” Andrew: “I shall become more powerful than you could possibly imagine…That boy is our last hope.” Warren: “No, there is another.” These are all quotes from Star Wars.
• In Potential, Xander says to Andrew, “Say Skywalker, and I smack you.” He is, of course, referring to Star Wars‘ Luke Skywalker.
• In Showtime, Andrew says, “I’m bored. Episode I bored.” He’s referring to George Lucas’s disappointing movie Star Wars Episode I: The Phantom Menace.
• In Never Leave Me, Warren/The First says, “I’m like Obi Wan”. He also says to Andrew, “We’re right in the trench, and the exhaust port’s in sight.” This is a reference to the scene in Star Wars in which the Death Star is under attack.
• In Bring on the Night, Andrew says, “I’m like Vader in the last 5 minutes of Jedi with redemptive powers minus a redemptive struggle of epic redemption which chronicles…” He’s referring to the last scenes of the final Star Wars movie Return of the Jedi.
• In Storyteller, there are two framed Star Wars comics on the wall in Andrew’s opening scene.
• In Dirty Girls, Andrew says, “But like so many tragic heroes, Faith was seduced by the lure of the dark side.”