The Three Doctors (Doctor Who) the Third Doctor (Jon Pertwee) for help when Omega drains their civilisation's power. The serial opened the tenth anniversary year of the series, and features the first three Doctors all appearing in the same serial. This makes it the first "Doctor Who" story in which an earlier incarnation of the Doctor returns to the show. A superluminal signal is sent to Earth, carrying with it an energy blob that seems intent on capturing the Doctor. The homeworld of the Time Lords is also under siege, their power being drained through a black hole. Trapped themselves, and desperate to send help,
The Monk (Doctor Who) an adversary of the Third Doctor and Fourth Doctor respectively. He also appears alongside the Eighth Doctor in "The Side of the Angels", the third adventure in the fourth "Doom Coalition" boxset, where he represents a group of Time Lords working with Weeping Angels to prepare an enclave in 1970s New York to protect them from the imminent destruction of the universe, only to be betrayed by the Angels and banished centuries into the past. The Hound incarnation makes a further appearance in ": The Rise of the New Humans", where he acts as the chief administrator of an exclusive