Firefly dream! The gang needs to break into a space station. The only way to get aboard is to get a permit on the planet below. Mal, Zoe and Kaylee, in disguise as reputable people, go to the planetary DMV-like agency office and apply. Their cover is good enough, and they qualify for the permit right away. It's in the form of a crystal cassette, about the size of a CD jewel case, and an office worker is preparing it. Bu Mal, being Mal, gets in a fight with an official, and their cover is blown. The office worker with the permit/key rolls her eyes, and throws the permit/key over her shoulder into a trash can. Kaylee or Zoe manages to steal the permit/key from the trash can and they get out of the office without further incident. But the permit/key won't work when they try it. It's encrypted somehow! So they go to one of their criminal contacts who might be able to help. This guy's digs feature huge wall completely covered with square crystalline tiles just like the key/permit they're carrying. They call his name, and several of them open up, and he pokes his head out to see who's there. He looks kinda like the gatekeeper at Emerald City in Oz. He puts their key/permit in some kind of machine and he figures out the encryption. "No problem! It's simply has a second program recorded over it - an old Buck Rogers or Flash Gordon serial!" Program ends there, but hey, it was the first dream I remember since I retired that wasn't work-related.