Doctor Who Season 23

No	Code	Title	Air Date	Eps	Exists
144	7A	The Mysterious Planet	06 Sep 1986	4	All
145	7B	Mindward	04 Oct 1986	4	All
146a	7C	Terror of the Vervoid	01 Nov 1986	4	All
146b	7C	The Ultimate Foe	29 Nov 1986	2	All

Notes:

These are unofficial episode titles since all stories this season were merely numbered episodes under the season title--Trail of A Timelord.

Episode Details

The Mysterious Planet

The Doctor and Peri arrive on the Earth in the distant future, only to find that civilization is gone and only a small number of stone age tribes remain. However the Doctor soon discovers another race living underground and under the control of a manic robot who appears to be guarding a dark secret.

Mindwarp

The Doctor and Peri travel to Thoros Beta, where they discover some very dangerous and unethical scientific experiments are being undertaken. Soon Peri is captured and becomes a subject in one of the experiments...

Terror of the Vervoids

The Doctor and Mel are on board an interstellar cruise liner when mysterious deaths and disappearances start occurring. The Doctor investigates and soon becomes suspicious of some scientists who are returning from an expedition with some very unusual plant life.

The Ultimate Foe

When the Master speaks to the court from within the Matrix, it becomes obvious that much of the evidence thus far presented may be false. The Master claims that the Doctor has been framed by the Timelords and that the Valeyard is merely a product of the Doctor's darker side. The Valeyard flees into the Matrix and the Doctor pursues him into the dangerous fantasy world the Valeyard has created within...

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