Gemma Chan (born 29 November 1982) is a British film, television, and theatre actress and former fashion model. She played Charlotte in season four of the Showtime and ITV2 series Secret Diary of a Call Girl (2007); Ruth in Channel 4's Fresh Meat (2011); Mia Bennett in Doctor Who: The Waters of Mars (2009), and Soo Lin in Sherlock: The Blind Banker...