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Arthur learns about Deep Thought, a computer built millions of years ago to discover the "Ultimate Answer", after 7 and a half million years, it had the answer: 42. So to decipher this answer, the builders of the computer commissioned a new, even larger computer to find the "Ultimate Question"; the Earth. It is discovered that Trillian's mice (the smartest creatures on Earth) were searching for the Ultimate Question, and they believe they can find the answer by first extracting Arthur's brain...

Episode Info

Episode number: 1x4
Production Number: 104
Airdate: Monday January 26th, 1981

Director: Alan Bell
Writer: Douglas Adams

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Guest Stars
David Tate
voiced PA (uncredited), Benjy Mouse
Richard Vernon
As Slartibartfast
Stephen Moore
voiced Frankie Mouse
Antony Carrick
As Loon-Quall (uncredited), Lunkwill
Charles McKeown
As Vroomfondel
David Leland (1)
As Majikthise
Marc Smith (1)
As Bang Bang
Timothy Davies (1)
As Phougg (uncredited), Fook
Valentine Dyall
voiced Deep Thought

Eddie Sommer
As Alien Robot
Eric French
As G'Gugvunt Leader
James Muir
As Vl'Hurg Leader
Richard Reid
As Guard
Warning: The Hitch Hikers Guide to the Galaxy season 1 episode 4 guide may contain spoilers
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