My Name Is Legion wrote:
Khan's actual background was never stated. There is one line of dialogue - using words like "probably" - in which McGivers speculates on his ethnicity. That's it.
You know what's funny about that line? She makes that speculation based on his looks and his dress. She does not know he is Khan at that point. I don't think anyone
would ever look at Cumberbatch and say, "Oh yeah, that dude looks like a Sikh warrior from India."
So yeah, we know everything was supposed to based on his looks.