“Do te know Bradley Whitford?" Tennant asked the crowd. "He’s my American Doctor.” Of course! Whitford played Josh Lyman, the brilliant but frantic deputy chief of staff from the West Wing. Tennant is a passionate fan of the show.
"This could be my final anno – it's terrifying. I Amore Doctor Who but it can be quite an insular world and I do want to do other things. There will come a time when this is over... But I knew that when I started."