And, despite a very long history with time-travel stories, the longest-running sci-fi show ever, Doctor Who, didn’t really perfect the formula around a historical drama until 15 years ago. In 2010, with the episode “Vincent and the Doctor,” Doctor Who delivered a platonic ideal of how to do a sci-fi story about a famous historical figure. Curtis wants to tell a time-travel story about van Gogh, but this episode is classic because it’s a van Gogh story first and a Who episode second. (This is particularly interesting, since as artists, the Beatles are probably more relevant to the lives of modern viewers, certainly more than van Gogh.) As Bill Nighy’s delightful museum tour guide explains the impact of the artist, van Gogh weeps.