|Directed by||Don Siegel|
|Produced by||James B. Harris|
|Written by||Walter Wager (novel)
|Music by||Lalo Schifrin|
|Cinematography||Michael C. Butler|
|Edited by||Douglas Stewart|
|Distributed by||United Artists|
After the Cuban Missile Crisis, the Soviet Union planted a number of long-term, deep-cover sleeper agents all over the United States, spies so thoroughly brainwashed that even they did not know they were agents; they could only be activated by a special code phrase (a line from Robert Frost's poem "Stopping by Woods on a Snowy Evening" followed by their real given names). Their mission was to sabotage crucial parts of the civil and military infrastructure as a precursor to a possible US/USSR active conflict or war.
Over twenty years pass, and the Cold War gradually gives way to détente. Nikolai Dalchimsky (Donald Pleasence), a rogue KGB headquarters clerk, travels to America, taking with him the Telefon Book, which contains the names, addresses and telephone numbers of all the agents. He starts activating them one by one. American counterintelligence is thrown into confusion when seemingly ordinary citizens start blowing up what are, in some cases formerly top secret facilities that were declassified or abandoned years before; the agents commit suicide afterwards if they survive.
The KGB dares not tell its political leaders, much less the Americans, about its negligence in not deactivating the spy network. Major Grigori Bortsov (Charles Bronson), who is selected for his photographic memory, memorizes the contents of the only other copy of the Telefon Book and is sent to find and stop Dalchimsky quickly and quietly, before either side learns what is going on and either embarrass the KGB or possibly start a nuclear war. He is given the assistance of only a single agent planted in America, Barbara (Lee Remick).
Eventually, Bortsov discovers the method behind Dalchimsky's madness: he chooses the agents by the first letters of their hometowns, "writing" his own name in sabotage across America. Using this information, Bortsov is finally able to track Dalchimsky down and kill him.
However, there are a number of twists. Barbara has orders from the KGB to assassinate Bortsov once he succeeds, in order to get rid of a dangerous loose end. She is a double agent, but when she informs her American superior, Harry Bascomb (Frank Marth), he also tells her to kill Bortsov, to gain the confidence of the KGB. However, she has fallen in love with her would-be target. She informs Bortsov, and together they blackmail both sides into leaving them alone, holding the threat of the remaining Telefon agents over their heads.
- Charles Bronson as Bortsov
- Lee Remick as Barbara
- Donald Pleasence as Dalchimsky
- Tyne Daly as Putterman
- Alan Badel as Colonel Malchenko
- Patrick Magee as General Strelsky
- Sheree North as Marie Wills
- Frank Marth as Sandburg
- John Mitchum as Harry Bascom
- Ed Bakey as Carl Hassler
- Hank Brandt as William Enders
As parts of the film were shot in Finland, there are several cameo appearances by Finnish movie stars, most notably Ansa Ikonen, arguably the most popular leading lady in the history of the country's cinema.
The city skyline depicting Houston, where part of the story line occurred, is actually that of Great Falls, Montana, where the majority of the film was shot. The exploding building in one scene is actually the controlled demolition of the old Paris Gibson Junior High School in Great Falls.
The Houston scenes were shot on a Hollywood backlot, while the interior of the Houston Hyatt Regency was portrayed by 5 Embarcadero Center in San Francisco, California - the location which was also used in The Towering Inferno.
According to director Don Siegel, actress Lee Remick was terrified of Charles Bronson, and when asked to touch his face during a scene, responded "I don't dare. He'll bite me!"
- The Manchurian Candidate
- The Simultaneous Man
- The Naked Gun: From the Files of Police Squad!, a comedy film whose plot borrows heavily from Telefon
- Salt, an 2010 action film starring Angelina Jolie about Russian sleeper agents
- Assassinations in fiction
- Conspiracy thriller
- Homeland (TV series)
- Variety film review; December 14, 1977, page 12.
- Siegel, Don (1993). A Siegel Film. Faber & Faber. pp. 419–433. ISBN 0-571-16270-3.