The Sex Changes That Made History (2015)

Sex reassignment surgery is now almost a commonplace procedure, but back in the early 20th century, it was seen as 'science fiction surgery'. When the news broke of a successful first attempt, it was a sensation. This is the gripping story of three extraordinary people: the world's first person to undergo a female to male transition; the former Spitfire pilot who became Britain's first to transition from male to female; and the daring advanced plastic surgeon who carried out these surgeries in the 1940s. Michael Dillon - previously named Laura - had persuaded the brilliant Sir Harold Gillies, the founding father of plastic surgery, to carry out the female-to-male operation that no surgeon in the world had ever attempted. Both then helped former race car driver and wartime pilot Robert Cowell undertake their own transition.

Unfortunately the movie The Sex Changes That Made History is not yet available on HBO Max.