What's the difference between a wormhole and a black hole? In Paul W. S. Anderson's Event Horizon it isn't clear. So Chris and Nathan help to clarify the issue by breaking down what wormholes are. They also riff on what it would take to build one and where it might take us. Notable movie talking points: practical VFX, how to take stuff home from a film set and Lucius Malfoy in space!