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 Master (Doctor Who) Finish did a trilogy of audios featuring the Master in 2016; "And You Will Obey Me" pits the Fifth Doctor against the Beevers incarnation of the Master, seeking to regain his body after an unspecified attack left him seriously injured and hunted, and "Vampire of the Mind" pits the Sixth Doctor against the MacQueen incarnation of the Master, who is seeking to drain the neural energy of the Doctor and various Earth scientists to restore his own mind after some terrible accident. These two storylines come together in "The Two Masters", in which the Seventh Doctor faces both of these