January 29, 1972
Episode 1 of Season 4 premiered on January 29, 1972
February 26, 1972
Episode 2 of Season 4 premiered on February 26, 1972
March 25, 1972
Episode 3 of Season 4 premiered on March 25, 1972
May 12, 1972
Episode 4 of Season 4 premiered on May 12, 1972
June 24, 1972
Episode 5 of Season 4 premiered on June 24, 1972
September 23, 1972
Episode 6 of Season 4 premiered on September 23, 1972
October 28, 1972
Episode 7 of Season 4 premiered on October 28, 1972
December 2, 1972
Episode 8 of Season 4 premiered on December 2, 1972