Orbiter X: An adventure in the conquest of space was a BBC Radio science fiction programme written by B.
D.
Chapman.
Only a single series was produced which was broadcast by the BBC Light Programme on Monday evenings in late 1959.
Presumed to have been wiped and lost, a set of discs of the entire series, recorded for the BBC Transcription Service, was discovered and restored.
Since 2016, Orbiter X has occasionally been repeated on the BBC's archive station, BBC Radio 4 Extra.