Season 1 of At Theatre Tonight premiered on July 21, 1966.

Season 2 of At Theatre Tonight premiered on January 13, 1967.

Season 3 of At Theatre Tonight premiered on March 7, 1968.

Season 4 of At Theatre Tonight premiered on January 3, 1969.

Season 5 of At Theatre Tonight premiered on January 9, 1970.

Season 6 of At Theatre Tonight premiered on January 14, 1971.

Season 7 of At Theatre Tonight premiered on January 10, 1972.

Season 8 of At Theatre Tonight premiered on January 5, 1973.

Season 9 of At Theatre Tonight premiered on January 5, 1974.

Season 10 of At Theatre Tonight premiered on January 13, 1975.

Season 11 of At Theatre Tonight premiered on January 2, 1976.

Season 12 of At Theatre Tonight premiered on January 1, 1977.

Season 13 of At Theatre Tonight premiered on January 6, 1978.

Season 14 of At Theatre Tonight premiered on January 12, 1979.

Season 15 of At Theatre Tonight premiered on January 11, 1980.

Season 16 of At Theatre Tonight premiered on January 16, 1981.

Season 17 of At Theatre Tonight premiered on January 15, 1982.

Season 18 of At Theatre Tonight premiered on July 8, 1983.

Season 19 of At Theatre Tonight premiered on May 19, 1984.

Season 20 of At Theatre Tonight premiered on January 5, 1985.

Season 21 of At Theatre Tonight premiered on February 22, 1986.