Among those pictured on the Master's psychic map as the most significant contributors to the advancement of human computer science are Bill Gates, Steve Jobs, Steve Wozniak, and Alan Turing OBE FRS.
As mentioned in the episode, Ada Lovelace was paralyzed for a time as a child. However, it was following a case of measles.
This episode takes place in 2020, 1834 and 1943.
Sacha Dhawan (The Master) plays Waris Hussein on the docudrama about Doctor Who (1963), An Adventure in Space and Time (2013).
Lenny Henry (Daniel Barton) previously played an alternative version of the Seventh Doctor in Episode #2.5 (1985).