K'Marree-943 was the producer of the radio show the Fifth Doctor accidentally presented. She reminded him of Madeleine Williams. She chastised him for how he was presenting the show. She only wanted angry callers on the show. She later put him at gun point. (AUDIO: Echo Chamber)
The Doctor would eventually discover that K’Marree-943, along with many other people throughout history who looked like her, were caused by a group of Time War Daleks who — while on a mission to prevent the rise of Time Lord society on Gallifrey — created a time distortion which created alternate versions of themselves as four un-mutated Kaled people. This time distortion also caused multiple copies of these four Kaleds to appear at various points throughout time and space. (AUDIO: Effect and Cause)