Jack Murdock (October 28, 1922 – April 27, 2001) was an American actor.

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Jack Murdock (1922–2001) was an American character actor who appeared in numerous stage, television, and film productions throughout the latter half of the 20th century.
He is recognized for his supporting roles in mainstream 1980s films including Rain Man, Blue Thunder, and Altered States.
He began his professional acting career after graduating from Ohio State University with a bachelor's degree in speech in 1950.