January 28, 1978
Episode 1 of Season 21 premiered on January 28, 1978
February 4, 1978
Episode 2 of Season 21 premiered on February 4, 1978
February 25, 1978
Episode 3 of Season 21 premiered on February 25, 1978
October 30, 1978
Episode 4 of Season 21 premiered on October 30, 1978
November 18, 1978
Episode 5 of Season 21 premiered on November 18, 1978