7.0/10547 votes#1 - The Mysterious Planet (1)
Season 23 Episode 1 - Aired 9/6/1986
The Doctor is taken "out of time" by the Time Lords and made to face an inquiry into his meddling in the affairs of others, overseen by the Inquisitor. The prosecutor, the Valeyard, soon has the proceedings upgraded to a trial for the Doctor's life. Evidence takes the form of recordings of the Doctor's recent adventures, beginning with his visit to the mysterious world of Ravalox and an encounter with Andromedan space pirates...
Director: Nicholas Mallett
Writer: Robert Holmes
6.8/10491 votes#2 - The Mysterious Planet (2)
Season 23 Episode 2 - Aired 9/13/1986
The Doctor has an appointment with the Immortal, while Peri finds herself caught up with Glitz and the Tribe of the Free. Meanwhile, Merdeen begins to question all he believes.
Director: Nicholas Mallett
Writer: Robert Holmes
6.8/10488 votes#3 - The Mysterious Planet (3)
Season 23 Episode 3 - Aired 9/20/1986
The Doctor escapes to rejoin Peri on the surface but shortly becomes the prisoner of a surface-dwelling tribe called The Free. Ravalox isn't Ravalox after all, but before the Doctor can learn much more an irresistible agent from UK Habitat comes to fetch him back.
Director: Nicholas Mallett
Writer: Robert Holmes
6.8/10490 votes#4 - The Mysterious Planet (4)
Season 23 Episode 4 - Aired 9/27/1986
All those on Ravolox are in exponentially greater peril than anyone can comprehend. If anything in the entire universe is to survive, it may come down to the Doctor arguing against machine logic over the value of life.
Director: Nicholas Mallett
Writer: Robert Holmes
6.9/10505 votes#5 - Mindwarp (1)
Season 23 Episode 5 - Aired 10/4/1986
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...
Director: Ron Jones
Writer: Philip Martin
6.9/10478 votes#6 - Mindwarp (2)
Season 23 Episode 6 - Aired 10/11/1986
The scientist Crozier keeps making empty promises and Yrcanos and Peri are seemingly betrayed by the addled Doctor who is sure the Matrix is being manipulated...
Director: Ron Jones
Writer: Philip Martin
6.8/10476 votes#7 - Mindwarp (3)
Season 23 Episode 7 - Aired 10/18/1986
While the Doctor helps Dr. Crozier transfer Lord Kiv's brain into a new host skull, Peri accompanies King Yrcanos as he searches for the Alpha Resistance fighters whom he feels, most certainly, will follow him into glorious battle against the Mentors and the Doctor.
Director: Ron Jones
Writer: Philip Martin
7.2/10489 votes#8 - Mindwarp (4)
Season 23 Episode 8 - Aired 10/25/1986
As the Possidor Ambassador visits, Sil is appalled to realise Crozier has selected Peri to be the Kiv's new host body - a move Yrcanos takes exception to with devastating results.
Director: Ron Jones
Writer: Philip Martin
6.8/10504 votes#9 - Terror of the Vervoids (1)
Season 23 Episode 9 - Aired 11/1/1986
With the prosecution case concluded, at last the Doctor is able to present his evidence. It takes place in the future with a new companion and new problems.
Director: Chris Clough
Writer: Pip Baker, Jane Baker
6.7/10472 votes#10 - Terror of the Vervoids (2)
Season 23 Episode 10 - Aired 11/8/1986
As the Hyperion III continues its journey, more mysterious deaths occur.
Director: Chris Clough
Writer: Pip Baker, Jane Baker
6.7/10473 votes#11 - Terror of the Vervoids (3)
Season 23 Episode 11 - Aired 11/15/1986
A course change that takes the Hyperion III closer to a black hole could prove unwise when there are so many aboard ship with hidden agendas. Disappearances continue, a murderer remains at large, and one person finally crumbles under the strain of harbouring a guilty secret.
Director: Chris Clough
Writer: Pip Baker, Jane Baker
6.7/10477 votes#12 - Terror of the Vervoids (4)
Season 23 Episode 12 - Aired 11/22/1986
With factions vying for control of the ship, the Vervoids are found to be responsible for the many disappearances. Only the Doctor sees the fundamental but missed point as to why they can't be reasoned with or why they can't be allowed to arrive on Earth.
Director: Chris Clough
Writer: Pip Baker, Jane Baker
7.3/10505 votes#13 - The Ultimate Foe (1)
Season 23 Episode 13 - Aired 11/29/1986
The Valeyard's true identity is revealed and the trial aborted, but the Doctor and Mel must pursue his new enemy into the Matrix itself, where nothing is quite what is seems…
Director: Chris Clough
Writer: Robert Holmes
6.7/10493 votes#14 - The Ultimate Foe (2)
Season 23 Episode 14 - Aired 12/6/1986
The final part of this epic adventure. The Doctor and the Valeyard have entered the world of the Matrix. Can the Doctor defeat the evil incarnation of himself ?
Director: Chris Clough
Writer: Robert Holmes
The Best Episodes of Doctor Who Season 23
Every episode of Doctor Who Season 23 ranked from best to worst. Discover the Best Episodes of Doctor Who Season 23!
The adventures of The Doctor, a time-traveling humanoid alien known as a Time Lord. He explores the universe in his TARDIS, a sentient time-traveling spaceship....
Genres:DramaAction & AdventureSci-Fi & Fantasy
Season 23 Ratings Summary
"The Mysterious Planet (1)" is the best rated episode of "Doctor Who" season 23. It scored 7/10 based on 547 votes. Directed by Nicholas Mallett and written by Robert Holmes, it aired on 9/6/1986. This episode is rated 0.2 points higher than the second-best, "The Mysterious Planet (2)".