Doctor Who: 28 Great Behind The Scenes Shots You Need To See
22. Spoilers, Sweetie!
Here's Matt Smith and Alex Kingston on location in Utah during filming on the Series 6 two-parter, The Impossible Astronaut and Day of the Moon.
Alex was introduced as River Song back in Series 4 and what was originally intended to be a one off appearance soon escalated into many more when her character was eventually revealed to be the daughter of Amy and Rory who was kidnapped shortly after birth and raised into a psychopathic killing machine who killed the Doctor dressed as an astronaut. Seriously. Only in Doctor Who, eh?