"I'm absolutely thrilled," said Bradley, who recently appeared alongside Matt Smith's Time Lord in the Doctor Who episode 'Dinosaurs on a Spaceship'. "Mark has written such a wonderful script not only about the birth of a cultural phenomenon, but a moment in television's history. William Hartnell was one of the finest character actors of our time and as a fan I want to make sure that I do him justice. I'm so looking forward to getting started.
Also featuring in the cast of An Adventure in Space and Time are Bryan Cox (X2: X-Men United) and Jessica Raine (Call the Midwife) as producers Sydney Newman and Verity Lambert, and Sacha Dhawan (Last Tango in Halifax) as Waris Hussein, the director of the first ever Doctor Who episode, 'An Unearthly Child'.
An Adventure in Space and Time is set to air on BBC Two later this year.