Audiences weren't the only ones perplexed by the Uhura/Spock romance in JJ Abrams' Star Trek reboot. Nichelle Nichols herself found the concept implausible.
Poor C-3PO is blown to bits in Star Wars: The Empire Strikes Back. And Anthony Daniels does not remember the effort it took to play him in those scenes fondly.
By the time the season 3 Twilight Zone episode 'The Arrival' aired, it was evident series creator Rod Serling was struggling to come up with fresh ideas.
Chadwick Boseman seemed born to play Black Panther, but in fact, he auditioned for a much quirkier Marvel movie before that film was even in the making.