when did prism started
PRISM (TV network) - History. 1  PRISM launched at 5:30 p.m. Eastern Time on September 1, 1976; it debuted with a message by announcer Hugh Gannon: Good evening, everyone. PRISM, the pay-television network, is on the air.. Following this was the first movie to be broadcast on PRISM, the 1975 film The Wind and the Lion.