The Doctor's TARDIS is stolen, and tracking it down reveals the existence of an alien named Kalid controlling events in the past. While the Doctor challenges Kalid's motives for being there, Tegan and Nyssa discover the source of Kalid's power - an even greater threat for the Doctor.
- Directed by
- Ron Jones
- Written by
- Peter Grimwade
Guest stars
All episodes — Season 19
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S19 E1Castrovalva (1)
Jan 4, 19827.125 min
Southern England, 1981. The universe has been saved, but at the cost of the fourth Doctor's life. The newly-regenerated fifth Doctor must rely on his friends to survive as the regeneration threatens to fail…
S19 E2Castrovalva (2)
Jan 5, 19827.125 min
The TARDIS is plunging toward destruction. But even if the Doctor can escape, is yet another trap waiting?
S19 E3Castrovalva (3)
Jan 11, 19827.124 min
The Doctor has arrived in the supposed safety of Castrovalva. But something is odd about the seemingly tranquil city…
S19 E4Castrovalva (4)
Jan 12, 19827.325 min
The TARDIS crew are caught in a space-time trap. Escaping will mean a final confrontation with the Master.
S19 E5Four to Doomsday (1)
Jan 18, 19826.224 min
Deep space, four days from Earth, 1981. The TARDIS materialises aboard a massive Urbankan starship. What is the real agenda of Monarch, master of the vessel?
S19 E6Four to Doomsday (2)
Jan 19, 19826.225 min
The Doctor and his companions explore Monarch's vessel. But what is the secret of the ancient Earthlings aboard?