I had never considered it before Daniel Feit tweeted this photo, but now it's obvious: Robert Picardo, who played the Doctor on Star Trek: Voyager, would do an excellent job of playing the Doctor on Doctor Who. He has no name and already has the job title!
And who should be his companion? Jeri Ryan, who played Seven of Nine.
-via Richard A. Eisenbeis
"Please state the nature of your temporal emergency."