The Invasion was an eight-part Doctor Who story, which was created and transferred in 1968. Written by Derrick Sherwin (from a story by Kit Pedler) became Patrick Troughton to the second doctor. At the top was Douglas Camfield, one of the most idiosyncratic and talented Directors of television in the 1960s and 1970s The music was composed by Don Harper. The music was composed by Don Harper, the third Australian emigrant (after Ron Grainer and Dudley Simpson), who worked on the program. The Master tape of the music to The Invasion went out soon after the Transmission lost, but Harper retained a 7? ips "composer's copy", which constitutes the basis of this publication. In addition, the score was formed by the extensive In addition, the score has been enhanced by the extensive Use of electronic sounds by Brian Hodgson of the BBC Radiophonic Workshop added.