This week on the show it's Lost in Science Fiction, our annual Halloween extravaganza where we deep dive into what's real and what's dubious in the scifi world. 
Stu brings us the years hottest topic, Artificial Intelligence, and how it has been treated by scifi cinema. And ever wondered if we could really travel to different galaxies faster than the speed of light? Could hyperdrive be real? Chris takes a look at the maths and physics of it all.