April 5, 1980
Episode 1 of Season 4 premiered on April 5, 1980
April 12, 1980
Episode 2 of Season 4 premiered on April 12, 1980
April 19, 1980
Episode 3 of Season 4 premiered on April 19, 1980
April 26, 1980
Episode 4 of Season 4 premiered on April 26, 1980
May 3, 1980
Episode 5 of Season 4 premiered on May 3, 1980
May 10, 1980
Episode 6 of Season 4 premiered on May 10, 1980