Helped by his new assistant, the young Scots scientist Robert McIntosh, the Doctor struggles to unravel the twisted knot of temporal implausibilities which bind the TARDIS to Thomas Brewster. Meanwhile, lost in the stews of Victorian London, Nyssa must face a host of spectral creatures gathering in the fog.
Written By: Jonathan Morris
Directed By: Barnaby Edwards
Peter Davison (The Doctor); Sarah Sutton (Nyssa); Leslie Ash (Mother); Christian Coulson (Robert McIntosh); John Pickard (Thomas Brewster); Barry McCarthy(Creek); Sid Mitchell (Pickens); Trevor Cooper (Shanks)