The Doctor's trial continues. The Valeyard's next piece of evidence for the prosecution concerns the Doctor's recent trip to Thoros Beta. Though originally investigating arms dealing, the Doctor and Peri become embroiled in their old enemy Sil's alarming neurological experiments...

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...