The further I went in watching the TV series, the more I wanted to go back to the original book on which it was based. the series is an intricate web of interwoven plots, with an extravagant mix of themes and characters. how much of this, I wondered, was actually based on fact? Not a lot, as it turns out. There are heavy emphases on homosexuality and race, neither of which appear in the book. Many of the highly entertaining cast are sheer inventions, which is fine. But saddest of all is the central relationship between Masters and Johnson. OK,I should have known. Michael Sheen and Lizzie Caplin were always too good to be true, but the real-life relationship between them is sadder and duller than it looks on the screen. This shouldn’t come as a surprise, but I can’t help feeling cheated.