A special feature on the UK Steelbook edition of Prometheus reveals that Weyland's mentor was Eldon Tyrell, creator of the replicants in Blade Runner. It makes about as much sense as anything else in Prometheus.
River Song. The only person in the universe who can make a Dalek scream for mercy. B1tch please. Rose Tyler. The only person in the universe to show mercy to a Dalek. B1tches please. Donna Noble. The only person who could make the Daleks spin around in circles, helpless.