Revealing mistake: In the arcade the killer talks to his helper while playing a pinball machine. He plays very agitated and strongly. But if you look closer at the below end of the playfield you see that there is no ball and the flippers aren't moving. (00:23:50 - 00:24:48)
Quincy M.E. (1976)
1 revealing mistake in Vigil of Fear
Starring: Jack Klugman, John S. Ragin, Joseph Roman, Robert Ito
Continuity mistake: Lee states that she had won 1288 dollars when gambling - but in the German translated version and in the German subtitles it's 1284 dollars. (00:12:10)