Last updated 04 May 2015

Doctor Who: Exploration Earth

Exploration Earth

No of Episodes: 1

Writer: Bernard Venables

Starring: Tom Baker, Elisabeth Sladen, John Westbrook

Not broadcast.

In this special BBC schools radio episode, not heard since its original 1976 broadcast, the TARDIS takes the Fourth Doctor and Sarah back in Time to witness stages of the Earth's development. However, as the planet evolves from a mass of heat and gas, Megron the High Lord of Chaos has his own designs on our homeworld. If his threats to endanger the stability of Earth have any substance, the existence of mankind itself is in question!