The lightsaber is a staple in the Star Wars universe. It's used by both Jedis and the Sith -- but why should they have all the fun?
Thanks to Photoshop and creative folks with too much time on their hands, lightsabers have crossed over. They've found a way into other sci-fi favorites like Doctor Who,Tron and (dare we say) Star Trek.
Here are 15 photos that showcase their universal appeal.