Those working on Star Trek Into Darkness were supposed to be sworn to secrecy but guest star Benedict Cumberbatch told someone that John Harrison was really Khan Noonien Singh.
In an appearance on The Graham Norton Show, Cumberbatch explained that he told this to someone who “deserved to know,” Stephen Hawking.
The two were out drinking. “We were into our third margarita, I think, and I decided to tell him,” said Cumberbatch.
When asked if Hawking told anyone, Cumberbatch said, “not as far as I’m aware.”
Source: ET Canada