Earthsearch: A Ten-Part Adventure Serial in Time and Space is a British science fiction radio series written by James Follett. It consists of ten half-hour episodes. It was first broadcast on BBC Radio 4 between January and March 1981. There is also a novelisation by Follett of the same name. The series has been released on cassette and audio CD. Since 2003 it has been re-broadcast, several times in the Seventh Dimension science fiction slot on BBC 7 and its successor BBC Radio 4 Extra.