Planet of the Spiders is the fifth and final serial of the 11th season
of the British science fiction television series Doctor Who, which was
first broadcast in six weekly parts on BBC1 from 4 May to 8 June 1974.
It was Jon Pertwee's last serial as the Third Doctor, and marks the
first, uncredited appearance of Tom Baker as the Fourth Doctor. It
marks the last regular appearance of Mike Yates. This serial
introduces the term "regeneration".The serial is set in England and on
the planet Metebelis Three. In the serial, the fired salesman Lupton
(John Dearth) allies with a race of psychic spiders called the
Eight-Legs to gain power.Following the events of Invasion of the
Dinosaurs, Mike Yates was discharged from UNIT and is now attending a
Tibetan meditation centre in rural England. Sarah Jane Smith visits
him and they witness some curious events, seemingly organised by a
resident called Lupton, and his cronies. Mike and Sarah stumble across
Lupton performing an incantation, which conjures up a giant spider. It
jumps on Lupton’s back and then disappears. The spider manifests
itself in Lupton’s head, telling him to seek out and locate a
certain blue crystal.The Third Doctor has developed an interest in
psychic ability, but his testing of a clairvoyant called Professor
Clegg backfires when his subject has a heart attack. It is triggered
when Clegg comes into contact with a blue crystal from Metebelis Three
(sent back from the Amazon by Jo Grant), which caused him to see the
image of deadly spiders. Sarah returns from the retreat and she and
the Doctor swap spider tales. Meanwhile, Lupton has also arrived at
UNIT HQ and steals the crystal from the Doctor’s laboratory. A
multi-vehicle chase ensues which Lupton escapes by teleporting himself
back to the monastery. Once there, the spider reveals that it is
plotting against some of its sisters back on Metebelis Three. The
spiders and the crystal originate from the same blue planet in the
Acteon Galaxy the Doctor the last visited (during The Green Death). Planet of the Spiders Biography, NetWorth, Height, Age, Weight, Family, Married, Son, Daughter