created by (118 episodes, 1974-1980)
written by (22 episodes, 1975-1979)
teleplay by (13 episodes, 1974-1978)
story by (3 episodes, 1975-1978)
story by (16 episodes, 1974-1975)
written by (24 episodes, 1975-1979)
teleplay by (8 episodes, 1974-1977)
story by (1 episode, 1978)
written by (17 episodes, 1976-1979)
teleplay by (2 episodes, 1978)
written by (9 episodes, 1975-1979)
written by (3 episodes, 1978-1979)
teleplay by (2 episodes, 1975-1980)
story by (4 episodes, 1975-1978)
teleplay by (2 episodes, 1975)
written by (2 episodes, 1976)
written by (2 episodes, 1975-1976)
story by (2 episodes, 1976-1980)
teleplay by (1 episode, 1980)
written by (1 episode, 1976)
teleplay by (1 episode, 1977)
written by (1 episode, 1978)
written by (2 episodes, 1977)
written by (1 episode, 1977)
teleplay by (1 episode, 1979)
written by (1 episode, 1979)
written by (1 episode, 1974)
teleplay by (1 episode, 1974)
written by (1 episode, 1975)
story by (1 episode, 1975)
teleplay by (1 episode, 1975)
based on the novel "Thin Air" by (1 episode, 1975)
story by (1 episode, 1976)
story by (1 episode, 1977)
story by (1 episode, 1979)