M was played by Bernard Lee from the first Bond film, "Dr. No", until "Moonraker" (1979). In "Dr. No," M refers to his record of reducing the number of operative casualties since taking the job, implying someone else held the job recently before him. The film also saw M refer to himself as head of MI7; Lee had originally said MI6, but was overdubbed with the name MI7 prior to the film's release. Earlier in the film, the department had been referred to as MI6 by a radio operator.