June 9, 1971 • 50m
Episode 1 of Season 4 premiered on June 9, 1971
June 16, 1971 • 50m
Episode 2 of Season 4 premiered on June 16, 1971
June 23, 1971 • 50m
Episode 3 of Season 4 premiered on June 23, 1971
June 30, 1971 • 50m
Episode 4 of Season 4 premiered on June 30, 1971
July 7, 1971 • 50m
Episode 5 of Season 4 premiered on July 7, 1971
July 14, 1971 • 50m
Episode 6 of Season 4 premiered on July 14, 1971
July 21, 1971 • 50m
Episode 7 of Season 4 premiered on July 21, 1971
July 28, 1971 • 50m
Episode 8 of Season 4 premiered on July 28, 1971
August 4, 1971 • 50m
Episode 9 of Season 4 premiered on August 4, 1971
August 11, 1971 • 50m
Episode 10 of Season 4 premiered on August 11, 1971
August 18, 1971 • 50m
Episode 11 of Season 4 premiered on August 18, 1971
August 25, 1971 • 50m
Episode 12 of Season 4 premiered on August 25, 1971
September 1, 1971 • 50m
Episode 13 of Season 4 premiered on September 1, 1971