Telefon (1977) - IMDb
https://www.imdb.com/title/tt0076804/
WEBDec 16, 1977 · Telefon: Directed by Don Siegel. With Charles Bronson, Lee Remick, Donald Pleasence, Tyne Daly. A Russian officer is sent to the U.S. to try and stop sleeper agents who will mindlessly attack government entities when they hear certain coded words.
DA: 28 PA: 46 MOZ Rank: 53