During the height of the 3-D craze in the early-1950s, "Space Patrol" broadcast television's first experiment with three-dimensional imagery, in the 1953 episode "The Theft of the Rocket Cockpit." Viewers were encouraged in advance to buy specially packaged Ralston-Purina cereals that included 3-D viewing glasses. In addition to the 210 half-hour episodes that were filmed during the show's fourth and fifth season, 900 fifteen minute live-action episodes were shown on local T ...[Read Story ]