The four part story Warriors' Gate was the final section of the E Space trilogy was originally aired on the BBC between 3 and 24 January 1981. It was directed by Paul Joyce and produced by John Nathan – Turner. Making the story apparently led to plenty of heated discussion between the two of them, yet they did a superb job of making it. The script had been written by Steve Gallagher. The set unlike the storyline is simple but it is worth the viewers while watching every moment of every part. It was actually the third from last Doctor Who adventure that featured Tom Baker as the Fourth Doctor.
Joining the Fourth Doctor were his companions in the shape of Time Lady Romana (Lalla Ward), the robot K-9 (voice by John Leeson) and the boy genius Adric (Matthew Waterhouse). They are all seeking a way out of E Space, which together the Doctor and Adric can work out. They believe that they will be able to return to the normal universe, especially if the TARDIS behaves itself properly for a change.
However any plans for exiting E Space are put on hold when a creature takes full control of the TARDIS, and it takes the Doctor and his companions to the so called Warriors' Gate. The creature needs the Fourth Doctor's knowledge to achieve its own aims, which would not be a good thing for everything in e Space, and indeed far beyond it. For the majority of the four parts the action takes place in front of white nothingness, aside from the Warriors' Gate.
Aside from the TARDIS been near the Warriors' Gate there is also another trapped space ship whose crew and passengers also want to return to there respective homes. The Doctor works out that the gate can be used to do just that, but not everyone goes home.