The Doctor and Romana are trapped between the monstrous Kroll and the insane refinery commander. And there is no sign of the fifth segment of the Key to Time.

Doctor Who (1963) Season 16 Episodes...

• s16e01 - The Ribos Operation (1)
• s16e02 - The Ribos Operation (2)
• s16e03 - The Ribos Operation (3)
• s16e04 - The Ribos Operation (4)
• s16e05 - The Pirate Planet (1)
• s16e06 - The Pirate Planet (2)
• s16e07 - The Pirate Planet (3)
• s16e08 - The Pirate Planet (4)
• s16e09 - The Stones of Blood (1)
• s16e10 - The Stones of Blood (2)
• s16e11 - The Stones of Blood (3)
• s16e12 - The Stones of Blood (4)
• s16e13 - The Androids of Tara (1)
• s16e14 - The Androids of Tara (2)
• s16e15 - The Androids of Tara (3)
• s16e16 - The Androids of Tara (4)
• s16e17 - The Power of Kroll (1)
• s16e18 - The Power of Kroll (2)
• s16e19 - The Power of Kroll (3)
• s16e20 - The Power of Kroll (4)
• s16e21 - The Armageddon Factor (1)
• s16e22 - The Armageddon Factor (2)
• s16e23 - The Armageddon Factor (3)
• s16e24 - The Armageddon Factor (4)
• s16e25 - The Armageddon Factor (5)
• s16e26 - The Armageddon Factor (6)

Doctor Who (1963) Show Summary

Doctor Who is the longest-running science fiction TV series in history, airing initially from 1963 to 1989. Doctor Who is about ideas. It pioneered sophisticated mixed-level storytelling. Its format was the key to its longevity: the Doctor, a mysterious traveller in space and time, travels in his ship, the TARDIS. The TARDIS can take him and his companions anywhere in time and space. Inevitably he finds evil at work wherever he goes...