All Available Episode All Season 4 Episode 1. Show 1 Feb, 1975 45 minutes 0.0 2. Show 2 Mar, 1975 45 minutes 0.0 3. Show 3 Mar, 1975 45 minutes 0.0 4. Show 4 Mar, 1975 45 minutes 0.0 5. Show 5 Mar, 1975 45 minutes 0.0 6. Show 6 Apr, 1975 45 minutes 0.0