sentences:  The fifth Doctor would later become involved with the creation of the Cybermen in the audio story, "Spare Parts".Written by Rod Beacham, a scene breakdown for this four-part story was commissioned on 5 December 1980.The Fifth Doctor's first story was originally intended to be the four-part "Project Zeta Sigma", written by John Flanagan & Andrew McCulloch,who had previously scripted "Meglos".