K9s Mark I and Mark II correspond with each other. Mark I wishes Mark II a happy birthday. He tells Mark II that he and Leela are enjoying the social life on Gallifrey. He is very popular. He brags about defeating the Sontarans. He pokes fun at Mark II's life in E-Space. Mark II replies defensively. He thinks Mark I is "getting above" himself. He brags about the time he, Romana and the Fourth Doctor found the Key to Time. He and Romana are enjoying E-Space, having stopped the charity work. They are seeing the sights and are rather rich.