1. William Shatner
My last entry is the most important, but it's also the shortest because there's not much to be said that isn't already known. This is the man who played Captain Kirk, the original captain of the Enterprise. The man is a legend. He helped lead Star Trek into becoming one of the most famous science fiction franchises of all time. Oh, and did I mention he's an accomplished singer? Listen to him singing Rocket Man and She Blinded Me With Science. It's a sound you never thought you would hear. Okay listen, I was going to pick Leonard Nimoy for this spot, but due to Nimoy's partial retirement from on-screen acting and the restraining order he's filed against Sheldon in the show, I thought Shatner would be a better fit. The man is both awesome and hilarious that he HAS to show up on the show eventually. Even for just a scene, let us and the characters revel in all his glory. Bow down to the mighty Shat!