House of Secrets (1956-1978) #118

A Hollywood director who murdered a scriptwriter 35 years ago overhears his wife and her lawyer plotting to replace his new premiere with a film that the lawyer had produced reenacting the murder in order to convince the director that his victim has returned from the grave seeking revenge. When he enters the projection booth to confront them, the film strangles him. It turns out the lawyer did not have time to substitute the film after all, and both he and the wife were in the audience.