January 5, 1975
Episode 1 of Season 4 premiered on January 5, 1975
February 19, 1975
Episode 2 of Season 4 premiered on February 19, 1975
March 12, 1975
Episode 3 of Season 4 premiered on March 12, 1975
April 2, 1975
Episode 4 of Season 4 premiered on April 2, 1975
April 30, 1975
Episode 5 of Season 4 premiered on April 30, 1975
May 7, 1975
Episode 6 of Season 4 premiered on May 7, 1975
July 17, 1975
Episode 7 of Season 4 premiered on July 17, 1975