Doctor Who of the series and a film should be made by the BBC team and star the current TV Doctor. "Doctor Who" has appeared on stage numerous times. In the early 1970s, Trevor Martin played the role in "Doctor Who and the Daleks in the Seven Keys to Doomsday". In the late 1980s, Jon Pertwee and Colin Baker both played the Doctor at different times during the run of a play titled "Doctor Who – The Ultimate Adventure". For two performances, while Pertwee was ill, David Banks (better known for playing Cybermen) played the Doctor. Other original plays have been staged
K9 (Doctor Who) Jaeger) in the year 5000. K9 subsequently travelled with the Fourth Doctor (Tom Baker) and Leela (Louise Jameson) as a companion of the Doctor in his adventures in time and space until "The Invasion of Time" (1978). In this serial, K9 decides to remain on the Doctor's home planet of Gallifrey with Leela. Immediately afterwards, "Doctor Who" would introduce a second incarnation of K9, played by the same prop; the last scene of "The Invasion of Time" shows the Doctor unpacking a box labeled "K9 Mk II". Although the first incarnation of K9 does not appear again in televised "Doctor