With the Doctor now reluctantly admitting to genocide, things look bad. But the Doctor's nemesis, the Master, intervenes, and the real truth behind the trial comes to light - and with it, the shocking secret of the Valeyard's true identity...

Doctor Who (1963) Season 23 Episodes...

• s23e01 - The Mysterious Planet (1)
• s23e02 - The Mysterious Planet (2)
• s23e03 - The Mysterious Planet (3)
• s23e04 - The Mysterious Planet (4)
• s23e05 - Mindwarp (1)
• s23e06 - Mindwarp (2)
• s23e07 - Mindwarp (3)
• s23e08 - Mindwarp (4)
• s23e09 - Terror of the Vervoids (1)
• s23e10 - Terror of the Vervoids (2)
• s23e11 - Terror of the Vervoids (3)
• s23e12 - Terror of the Vervoids (4)
• s23e13 - The Ultimate Foe (1)
• s23e14 - The Ultimate Foe (2)

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...