Lambda 1

In the future, man has created a way of travel that literally tunnels through the very molecules of the solid earth itself. This is all accomplished in "TAU-mode" shuttles. But when a shuttle becomes encased deep within the Earth's crust, the only way to rescue its passengers is by using a fantastic, experimental "LAMBDA-mode" shuttle. Unfortunately, even its designer has no real clue as to whether it will succeed, or whether its pilot can keep from going mad during the mission. A very thought-provoking British TV feature.

• science fiction