All Available Episode All Season 4 Episode 1. Series 4, Episode 1 Oct, 1974 30 minutes 0.0 2. Series 4, Episode 2 Oct, 1974 30 minutes 0.0 3. Series 4, Episode 3 Oct, 1974 30 minutes 0.0 4. Series 4, Episode 4 Nov, 1974 30 minutes 0.0 5. Series 4, Episode 5 Nov, 1974 30 minutes 0.0 6. Series 4, Episode 6 Nov, 1974 30 minutes 0.0
