Richard Norton "Dick" Tufeld (December 11, 1926 -- January 22, 2012) was an American actor, announcer, narrator and voice actor from the late 1940s until the early 21st century. He was a well-known presence on television as an announcer, but his most famous role as the Robot in the television series, Lost in Space.

Answer this question: who voiced the robot in lost in space? Let's think fast. Stream of consciousness:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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The relevant information is: He was a well-known presence on television as an announcer, but his most famous role as the Robot in the television series, Lost in Space. So the final answer is `` Dick '' Tufeld.