I have an idea, though some may not like it. Say the "Dr. Who" films are done very very well. (I've never seen them, so maybe they were good, I can't say) So well in fact, they gain a certain level of popularity and respect in the United States. The popularity of the film inspires a major network, (my guess is CBS because they did the twilight Zone. But I could be wrong) to acquire a deal to show the series in the United States like the situation with The Avengers. The popularity of the film leads to a high initial viewership, and several seasons of the show run on American television. In fact, you might end up with two different Dr. Whos if the network in the United States decides it wants to go in a different direction than the official show. You might end up with the British Dr. Who, and an adapted American version.
okay, my idea probably doesn't work all that well, but its a start.
I have the nasty feeling you’d end up with an “adaptation” like the American versions of “Life on Mars” (Bad), and “Kath and Kim” (Appalling).