Episode #125 : Mawdryn Undead

"Maybe the capsule's malfunctioned. I hate those transmat things. Like travelling in a food mixer and just as dangerous. I'd be afraid of coming out puréed."

Episode 125:   Mawdryn Undead.
Companions:   5th Doctor, Tegan, Nyssa and Turlough.
Air Date:         1st to 9th February 1983.

The Black Guardian recruits a young man named Turlough to assassinate the Doctor. Although outwardly an ordinary pupil at a boys' private boarding school, Turlough is in fact an alien who believes that the Guardian will return him home if he succeeds. The TARDIS meanwhile has its instruments jammed by a mysterious signal and is forced to materialise on board a massive spaceship in a fixed orbit. The Doctor discovers that the signal - a beam to guide the ship's transmat capsule - is being transmitted from Earth. He travels down to the planet in the capsule, leaving Nyssa and Tegan in the TARDIS with the co-ordinates pre-set to follow. Things go wrong, however, as the Doctor arrives in 1983 but the TARDIS materialises in 1977.

Mawdryn Undead is a very well written story utilising a plot element that has been ignored for the past twenty years of the show, that of the time travellers being split up into different years and how their actions affect the events in the later time zone. In this regard Mawdryn Undead is an excellent example of the sort of stories that could come out of the show if the writers put their minds to it.

The second well conceived element of the story are the villains. Mawdryn and his followers aren't villains because they want to kill, conquer or destroy the universe. They simply want to die but can't. Now that the Doctor has arrived they feel that they can both be freed from their eternal agony and get some small revenge on the Time Lords who did this to them in the first place. A villain who isn't out to be evil for the sake of it is a nice change.

The Brigadier returns to the show with this story, now retired and working as a maths teacher in a boys school. Bit of a departure from running UNIT but I guess retirement can do that. Mawdryn Undead does introduce the biggest continuity issue of the entire show, the infamous UNIT dating controversy. You can read about that here.

The character of Turlough is introduced in this story and by the end of it he has become a companion of the Doctor. Turlough is an alien for some reason not yet explained is being forced to stay at a private boys school though he longs to return home. He is coerced into aiding the Black Guardian in his desire to kill the Doctor for revenge following the Key to Time storyline.