The Doctor Falls Bradley was filmed as part of the filming of the Christmas Special in June 2017. David Bradley appears at the episode's conclusion as the First Doctor. Bradley portrayed William Hartnell, the First Doctor's actor, in the docudrama "An Adventure in Space and Time" and appeared as the villain Solomon in "Dinosaurs on a Spaceship", as well as voicing the character of Shansheeth Blue in "Death of the Doctor" in the "Doctor Who" spin-off series "The Sarah Jane Adventures". The episode was watched by 3.75 million viewers overnight. Compared to other programmes that aired on the same night, "Doctor Who" fared
An Adventure in Space and Time was in the Season 21 serial "Frontios"; Mark Eden appeared as the title character in the Season 1 serial "Marco Polo"; Nicholas Briggs, who has voiced the Daleks since the series was revived in 2005, portrayed his own predecessor; and Brian Cox voiced the Elder Ood in "The End of Time". Jean Marsh and Anneke Wills, who both played companions to Hartnell's First Doctor also appeared during Verity Lambert's leaving party scene. The drama was watched by 2.71 million viewers in the UK. Rotten Tomatoes gave it a 95% approval rating based on 22 reviews, and an average score of