In July 2006, she appeared in an episode of the new "Doctor Who" series, and the producers were so impressed with her performance that they offered her the role of Martha Jones on the series' upcoming third season, debuting on March 31, 2007.
[on the growing popularity of Doctor Who in America] I can't believe how it has just exploded over here. When I was doing the show, we didn't get to come over to America and do any of the promotion. The new lot [of Doctor Who actors] did, but my agent said, 'Don't worry, whatever happens with them, it kind of ripples outwards and the whole family reaps the benefit of that', so it's been great for my career.
