Stone Tape
"Dead of Night" ran for a single series in the autumn of 1972. Of its seven 50-minute episodes, only three—"The Exorcism", "Return Flight", and "A Woman Sobbing"—are known to exist today in the BBC's archives. Another programme made by the "Dead of Night" production team under Innes Lloyd, "The Stone Tape", running to 90-minutes and intended to be the eighth episode, does survive in the archives but was not broadcast under the "Dead of Night" banner.