with 28 episodes premiered on September 17, 1966

with 25 episodes premiered on September 10, 1967

with 25 episodes premiered on September 29, 1968

with 26 episodes premiered on September 28, 1969

with 23 episodes premiered on September 19, 1970

with 22 episodes premiered on September 17, 1971

with 22 episodes premiered on September 15, 1972