David Hasselhoff

David Hasselhoff was an American television actor. He also experienced success as a pop music singer in Europe. In this capacity, he performed at the falling of the Berlin Wall. The Tenth Doctor once remarked that he had gone twice to the event in order to avoid Hasselhoff's singing. (NSA: Autonomy)
 * The Doctor's comments related to the real life song, "Looking for Freedom", which was a number one hit in Germany at the time of the fall of the Berlin Wall.

Behind the scenes

 * Hasselhoff briefly appears as himself in the non-canoncial National Television Awards Sketch 2011.