December 5, 1972
Episode 1 of Series 12 premiered on December 5, 1972
December 12, 1972
Episode 2 of Series 12 premiered on December 12, 1972
December 19, 1972
Episode 3 of Series 12 premiered on December 19, 1972
January 2, 1973
Episode 4 of Series 12 premiered on January 2, 1973
January 9, 1973
Episode 5 of Series 12 premiered on January 9, 1973
January 16, 1973
Episode 6 of Series 12 premiered on January 16, 1973
January 23, 1973
Episode 7 of Series 12 premiered on January 23, 1973
January 30, 1973
Episode 8 of Series 12 premiered on January 30, 1973
February 6, 1973
Episode 9 of Series 12 premiered on February 6, 1973
February 13, 1973
Episode 10 of Series 12 premiered on February 13, 1973
February 20, 1973
Episode 11 of Series 12 premiered on February 20, 1973
February 27, 1973
Episode 12 of Series 12 premiered on February 27, 1973
March 6, 1973
Episode 13 of Series 12 premiered on March 6, 1973
March 13, 1973
Episode 14 of Series 12 premiered on March 13, 1973
March 20, 1973
Episode 15 of Series 12 premiered on March 20, 1973
March 27, 1973
Episode 16 of Series 12 premiered on March 27, 1973