TR

Season 20, Episode 16

Terminus (4)

February 23, 198325 min

In attempting to reopen a doorway into the TARDIS, Turlough activates Terminus' automated fuel-jettisoning sequence. The first time this sequence was engaged, it flung its first of two massive loads of unstable fuel into the distant past, producing the Big Bang that created the universe. This second sequence - if the Doctor can't find a way to shut it down - will release a second massive load, the explosion of which will entirely negate the effects of the first.

Directed by
Mary Ridge
Written by
Stephen Gallagher

Guest stars

All episodes — Season 20

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  1. S20 E1

    Arc of Infinity (1)

    Jan 3, 1983625 min

    On Gallifrey, someone on the high council is perpetrating a treasonous act - transmitting the Doctor's bio-extract from the space/time matrix to an anti-matter being. On Earth, two English lads spend their last night in Amsterdam sleeping i

  2. S20 E2

    Arc of Infinity (2)

    Jan 5, 198325 min

    With an anti-matter being trying to enter the universe through the Doctor, risking the destruction of everything, there is only one clear course of action for the High Council of Time Lords to take: execute the Doctor. Meanwhile, Tegan arri

  3. S20 E3

    Arc of Infinity (3)

    Jan 11, 198325 min

    Something seemed amiss about the Doctor's execution, so the Castellan has Commander Maxil discreetly but fully look it. Meanwhile, as the Doctor meets the anti-matter being inside the Time Lord Matrix, Tegan and her cousin's friend run afou

  4. S20 E4

    Arc of Infinity (4)

    Jan 12, 198325 min

    The High Council creates a distraction so the Doctor and Nyssa can find Omega on Earth and prevent his reentry into our universe.

  5. S20 E5

    Snakedance (1)

    Jan 18, 1983625 min

    Tegan steers the TARDIS to the planet Manussa, without meaning to - but why? And is it a coincidence that the planet is about to celebrate the 500th anniversary of the expulsion of the insidious Mara?

  6. S20 E6

    Snakedance (2)

    Jan 19, 198325 min

    The Doctor talks to Ambril and Chela to try and stop the 500th anniversary celebrations. A possessed Tegan finds herself in Dugdale's Hall of Mirrors to where she summons Lon. The Doctor and Nyssa return to the caves.