March 26, 1974 Season 0 1 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! September 13, 1974 Season 1 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! September 12, 1975 Season 2 24 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! September 28, 1976 Season 3 24 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! October 25, 1977 Season 4 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!