David was an underground rebel fighting the Daleks in London in 2150. He met Dr. Who, Susan, Louise and Tom Campbell when Tardis landed in the city. (TV: Daleks' Invasion Earth 2150 A.D.)
The Dalek Survival Guide indicated that this version of David Campbell came from a version of reality "B" relative to the First Doctor's version of reality "A". (PROSE: Dalek Survival Guide)
.jpg){kind=link}