by (69 episodes, 1972-1985)
script by (69 episodes, 1972-1985)
creator (1 episode, 1979)
by (68 episodes, 1972-1985)
script by (55 episodes, 1972-1981)
by (4 episodes, 1974-1975)
script by (4 episodes, 1974-1975)
by (1 episode, 1975)
script by (1 episode, 1975)