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Procter &amp; Gamble started saving their shows around 1979. Very few pre-1979 color episodes of the Procter and Gamble-sponsored shows survive, with most extant episodes preserved as monochrome kinescopes. Exceptions include two episodes of "The Guiding Light" from November 1977 and another from 1973, which have been released on DVD. "As the World Turns" and "The Edge of Night" aired live until 1975, the year "The Edge of Night" moved to ABC and "As the World Turns" expanded from a 30-minute broadcast to one hour. Both shows began taping episodes in preparation for the move of "The Edge of Night" to ABC. "The Edge of Night"'s ABC debut is believed to have survived. Overall, the number of surviving monochrome episodes recorded on kinescope outnumber color episodes for these programs.