PBS, the Public Broadcasting Service, was in operation, but the schedule was set by each local station.
This is the last of the four seasons to carry a 21-hour (three hours every day) weekly prime time schedule, which was used from 1971 to 1975.
Each of the 30 highest-rated shows is listed with its rank and rating as determined by Nielsen Media Research.
[1] Note: 60 Minutes aired at 6:00-7:00 pm on CBS from September 1974 to June 1975.
Note: Dan August consisted of reruns of the 1970-1971 ABC series.