September 4, 1980
Episode 1 of Season 4 premiered on September 4, 1980
September 11, 1980
Episode 2 of Season 4 premiered on September 11, 1980
September 18, 1980
Episode 3 of Season 4 premiered on September 18, 1980
September 25, 1980
Episode 4 of Season 4 premiered on September 25, 1980