Guest Stars Joel Dommett as Himself Joe Wilkinson as Dr. Doctor Bliss Brian Quinn as Himself Theo Barklem-Biggs as Guy Gibson Joe Thomas as Alexander Graham Bell Samson Kayo as Bill Tom Bennett as A.R. 'Dick' Collins Alexander Armstrong as Sir Arthur Harris Chris O'Dowd as Sir Barnes Wallis Brett Goldstein as James Garfield Bruce MacKinnon as Charles Sumner Tainter Sal Vulcano as Himself Richard Glover as Railway Employee Matthew Steer as Charles Guiteau Lucy Middleditch as Librarian
