Deep Thought was a supernatural-computer programmed to calculate the answer to the Ultimate Question of Life, the Universe, and Everything. It designed the planet Earth, which was built by the Magratheans.
After seven and a half million years, the descendants of Lunkwill and Fook - Loonquawl and Phouchg - presided over the Day of the Answer, and were chosen to receive the answer to the Ultimate Question. Deep Thought came up with the result of 42 but didn't know the question itself, so it commissioned the Earth to calculate that inquiry. Sadly, the Earth was destroyed five minutes before it was going to give the question.
Deep Thought appeared or was mentioned in:
Behind the Scenes
Deep Thought was portrayed by: