3. The Introduction Of The Sisterhood Of Karn
Along with the Elixir of Life, The Brain of Morbius introduces fans to the wonderfully bonkers Sisterhood of Karn. Aside from the connections with the Time Lords mentioned before, the Doctor would also find himself face to face with the Sisterhood in 2013's The Night of the Doctor' n which Paul McGann's Eighth Doctor met his end (in what was only his second on screen outing - for shame!). In this short, as in The Brain of Morbius, the Elixir of Life assists the Doctor in regeneration and sheds further light on the audience's knowledge of regeneration. With the creation of the Sisterhood, Doctor Who was given a rich wider world into which Gallifrey fits quite naturally. This expansion of the fictional Doctor Who universe makes for truly enjoyable viewing which is referenced and remembered fondly to this day.