January 1, 1970
Episode 1 of Season 4 premiered on January 1, 1970
February 23, 1970
Episode 2 of Season 4 premiered on February 23, 1970
March 9, 1970
Episode 3 of Season 4 premiered on March 9, 1970
November 2, 1970
Episode 4 of Season 4 premiered on November 2, 1970
November 30, 1970
Episode 5 of Season 4 premiered on November 30, 1970