All Available Episode All Season 4 Episode 1. Series 4, Show 1 Jul, 1972 30 minutes 0.0 2. Series 4, Show 2 Jul, 1972 30 minutes 0.0 3. Series 4, Show 3 Jul, 1972 30 minutes 0.0 4. Series 4, Show 4 Aug, 1972 30 minutes 0.0 5. Series 4, Show 5 Aug, 1972 30 minutes 0.0 6. Series 4, Show 6 Aug, 1972 30 minutes 0.0 7. Series 4, Show 7 Sep, 1972 30 minutes 0.0
