River Song debuted in the fourth series two-parter ‘Silence in the Library’/‘Forest of Death’ and shocked the Tenth Doctor (David Tennant) by revealing a great knowledge of his future. The character has since returned in Matt Smith’s inaugural series and in last Saturday’s episode ‘The Impossible Astronaut’.
“When I first did Doctor Who with David Tennant, I wasn’t expecting that at all,” she admitted. “As far as I was concerned, it was just a two-episode story arc with me being held forever in a computer, or whatever. But Steven always intended that she would come back.”
The actress also sad her favorite aspect of portraying the professor, whose identity is shrouded in ambiguity, is that the various incarnations of The Doctor never meet River in chronological order.
“The really exciting journey for me, and for Steven, is backtracking. The characters keep missing each other,” Kingston added. “She’s like The Time Traveler’s Wife. In this particular season, and certainly in the first two episodes, what you see is her knowing that she’s on the brink of the moment where the Doctor doesn’t know any more who she is. And I think that’s just tragic, really.”
Be prepared to have Kingston and River Song to break our hearts.