Exploration Earth (audio story)

<!-- {{Infobox NewTV David Lyttle
 * story name     = Exploration Earth:The Time Machine
 * image          =
 * series         = N/A (Aired during series 14)
 * number         = N/A
 * story number   = N/A
 * doctor         = Tom Baker as theFourth Doctor
 * companions     = Elisabeth Sladen as Sarah Jane Smith
 * enemy          = Megron,High Lord Of Chaos
 * setting        = Earth (Different times in history)
 * writer         = Bernard Venables
 * director       = N/A
 * producer       = Mike Howarth
 * broadcast date = 4th October 1976
 * format         = Audio
 * production code = N/A
 * previous story = N/A
 * next story     = N/A

Synopsis
The Doctor and Sarah Jane materialize in space and see the birth of Earth

Cast
Tom Baker as The Fourth Doctor

Elisabeth Sladen as Sarah Jane Smith

John Westbrook as Megron

Story notes
First broadcast on BBC Radio 4 on 4th October 1976

1 episode, 20 minutes

Audio Releases
First released on CD in 2001,paired with Genesis Of The Daleks

Given free with The Daily Telegraph newspaper on 28th April 2010 via WHSmith