All Available Episode All Season 4 Episode 1. Episode 1 Jan, 1972 55 minutes 0.0 2. Episode 2 Feb, 1972 55 minutes 0.0 3. Episode 3 Mar, 1972 55 minutes 0.0 4. Episode 4 Mar, 1972 55 minutes 0.0 5. Episode 5 Apr, 1972 55 minutes 0.0 6. Episode 6 May, 1972 55 minutes 0.0 7. Episode 7 Jun, 1972 55 minutes 0.0 8. Episode 8 Jun, 1972 55 minutes 0.0 9. Episode 9 Oct, 1972 55 minutes 0.0 10. Episode 10 Nov, 1972 55 minutes 0.0 11. Episode 11 Nov, 1972 55 minutes 0.0 12. Episode 12 Dec, 1972 55 minutes 0.0