January 12, 1975 Season 1 21 Episodes How to watch?:Please click on the Season List, then select an episode. Wait for the video to load—usually, it doesn't take long! January 25, 1976 Season 2 22 Episodes How to watch?:Please click on the Season List, then select an episode. Wait for the video to load—usually, it doesn't take long! January 02, 1977 Season 3 23 Episodes How to watch?:Please click on the Season List, then select an episode. Wait for the video to load—usually, it doesn't take long! January 01, 1978 Season 4 37 Episodes How to watch?:Please click on the Season List, then select an episode. Wait for the video to load—usually, it doesn't take long! January 07, 1979 Season 5 37 Episodes How to watch?:Please click on the Season List, then select an episode. Wait for the video to load—usually, it doesn't take long! January 06, 1980 Season 6 25 Episodes How to watch?:Please click on the Season List, then select an episode. Wait for the video to load—usually, it doesn't take long!