1/6 The TARDIS lands in Tibet in 1935, where the Doctor is accused of murder…
4/4 The Cybermen have left their icy tombs, planning to turn everyone into Cybermen.
3/4 The tombs are a trap. The Cybermen have risen from their centuries long slumber.
2/4 Professor Parry and his team begin to unlock the secrets of the Cybermen's tomb.
1/4 The Doctor meets some archaeologists investigating the Cybertombs on the planet Telos.