In Mission: Impossible - Fallout the White Widow was a broker, arranging a deal between Hunt posing as John Lark and...who exactly?
The seller couldn't have been:
- Walker, because he jumped at the chance to obtain the bombs in the exchange in London, meaning he didn't have them
- Lane, who had just been freed from French police custody and had no possessions at all
- The Apostles (who stole it and yet somehow lost it to someone else) because they are the very people who wanted the bomb
And whoever this seller was, how did Walker and Lane obtain the cores from the seller to use them in Kashmir?