The TARDIS lands on Earth six years out of date, stranding the Doctor in 1983 while leaving Tegan and Nyssa to look for him in 1977. Both parties also encounter former companion, Brigadier Lethbridge-Stewart, though curiously, he has no memory of the Doctor at all.
- Directed by
- Peter Moffatt
- Written by
- Peter Grimwade
Guest stars
All episodes — Season 20
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S20 E1Arc 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
S20 E2Arc 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
S20 E3Arc 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
S20 E4Arc 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.
S20 E5Snakedance (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?
S20 E6Snakedance (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.