July 1, 1980
Episode 2 of Season 20 premiered on July 1, 1980
July 4, 1980
Episode 5 of Season 20 premiered on July 4, 1980
July 9, 1980
Episode 8 of Season 20 premiered on July 9, 1980
July 10, 1980
Episode 9 of Season 20 premiered on July 10, 1980
July 18, 1980
Episode 15 of Season 20 premiered on July 18, 1980
July 28, 1980
Episode 21 of Season 20 premiered on July 28, 1980
July 29, 1980
Episode 22 of Season 20 premiered on July 29, 1980
July 30, 1980
Episode 23 of Season 20 premiered on July 30, 1980
July 31, 1980
Episode 24 of Season 20 premiered on July 31, 1980
August 1, 1980
Episode 25 of Season 20 premiered on August 1, 1980
August 5, 1980
Episode 27 of Season 20 premiered on August 5, 1980
August 27, 1980
Episode 43 of Season 20 premiered on August 27, 1980
September 15, 1980
Episode 46 of Season 20 premiered on September 15, 1980
September 17, 1980
Episode 48 of Season 20 premiered on September 17, 1980
September 18, 1980
Episode 49 of Season 20 premiered on September 18, 1980
September 19, 1980
Episode 50 of Season 20 premiered on September 19, 1980