June 6, 1950-June 25, 1957 (NBC). October 2, 1957-August 28, 1963 (CBS). Anthology series which specialized in dramatizations of actual events. One hour format began in 1955 when the series began a biweekly run. John Cameron Swayze hosted the show on NBC. Douglas Edwards, Ron Cochran and Henry Hamilton hosted the show on CBS. SEARCH PROGRAM TITLE FOR COMPLETE DETAILS.