Even while the torturous writing stage was plodding its course, the director's excitement about the project was boundless. "Hitchcock raced ahead of everyone: the script, the cast, the studio... pieces of the film were dancing like electrical charges in his brain."  The more the film resolved in his mind's eye, the more he knew his director of photography would play a critical role in the scenes' execution. He found exactly what he needed right on the Warners lot in the person of staff cameraman Robert Burks , who would continue to work with Hitchcock, shooting every Hitchcock picture through to Marnie (1964), with the exception of Psycho .  "Low-keyed, mild mannered", Burks was "a versatile risk-taker with a penchant for moody atmosphere. Burks was an exceptionally apt choice for what would prove to be Hitchcock's most Germanic film in years: the compositions dense, the lighting almost surreal, the optical effects demanding."  None was more demanding than Bruno's strangulation of Miriam, shown reflected in her eyeglass lens: "It was the kind of shot Hitchcock had been tinkering with for twenty years—and Robert Burks captured it magnificently."