Eyewitness (also entitled Sudden Terror in the US) is a 1970 British drama film directed by John Hough. The film is a British adaptation of a novel by Mark Hebden, the pen name for John Harris. The plot is similar to Cornell Woolrich's novelette "The Boy Cried Murder", originally adapted for film as The Window. The overarching story is that of the ancient tale of The Boy Who Cried Wolf – a habitual liar not being believed when they are actually telling the truth.