Original sentence: Moreover one of the principal guest stars in this story is the Dead Ringers actor and impressionist Jon Culshaw.The script has some elements which spoof The Hitchhikers Guide to the Galaxy (there is a robot which evokes memories of Marvin, the Paranoid Android); it has William Shakespeare (complete with a humorous, but authentic, cod-Birmingham accent); and it has King Richard III (both the character in Shakespeare's play, and the actual king in 1485)
Edited sentence: Moreover one of the principal guest stars in this story is the Dead Ringers actor: impressionist Jon Culshaw.The script has some elements which spoof The Hitch-Hikers Guide to the Galaxy (there is a robot which evokes memories of Marvin, the Paranoid Android); it has William Shakespeare (complete with a humorous, but authentic, cod-Birmingham accent); and it has King Richard iii(both the character in Shakespeare's play, and the actual king in 1485).The serial spirals backwards and forwards through time, in one of the most complex time-travel plots in Doctor Who.The story was conceived and executed on a grand scale, hurtling back and forth across the centuries, meeting gigantic historical figures in authentic settings, with a script that is reminiscent of Douglas Adams.This story bears resemblance to City of Death