January 1, 1971 • 45m
Episode 1 of Season 4 premiered on January 1, 1971
February 5, 1971 • 38m
Episode 2 of Season 4 premiered on February 5, 1971
March 26, 1971 • 42m
Episode 3 of Season 4 premiered on March 26, 1971
April 23, 1971 • 39m
Episode 4 of Season 4 premiered on April 23, 1971
May 21, 1971 • 50m
Episode 5 of Season 4 premiered on May 21, 1971
June 25, 1971 • 50m
Episode 6 of Season 4 premiered on June 25, 1971
July 23, 1971 • 50m
Episode 7 of Season 4 premiered on July 23, 1971
September 3, 1971 • 50m
Episode 8 of Season 4 premiered on September 3, 1971
October 8, 1971 • 53m
Episode 9 of Season 4 premiered on October 8, 1971
November 12, 1971 • 50m
Episode 10 of Season 4 premiered on November 12, 1971
December 9, 1971 • 50m
Episode 11 of Season 4 premiered on December 9, 1971
December 16, 1971 • 44m
Episode 12 of Season 4 premiered on December 16, 1971