When one considers all the various elements involved in the production of Telefon, it makes it all the more disappointing that the movie fails to reach its potential. The basic idea about sleeper agents in the US is sound but the story doesn’t really go anywhere and not a great deal happens. The strong cast featuring Charles Bronson, Lee Remick and Donald Pleasance have to do their best with an undeveloped screenplay. Considering that it was written by Peter Hyams and Stirling Silliphant (from a novel by Walter Wager) it is quite surprising how lacklustre it all is. But perhaps the most saddening aspect of the film is the somewhat indifferent direction from Don Siegel, who by his own admission was not especially engaged with the story. Considering that he had scored a major hit the previous year with John Wayne’s swansong The Shootist, makes it more curious that he wasn’t more enthused. Even Lalo Schifrin’s score fails to bolster Telefon.