Episode 71

21st May 1981 Season 17 Episode 71

Gaping Gill Every year high in the Pennines local cavers build a dam to divert a stream and Britain's largest subterranean cave reveals its secret for just three weeks. Peter reports from 104 metres below the earth's surface at the bottom of Gaping Gill.

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Season 17 · Episode 72

Episode 72

Prince's First Walk Teaching a trainee guide dog puppy to walk is quite different from training a family pet. Prince must never walk to heel, but just a little bit ahead of Peter to make sure there's a safe route ahead. He has to walk on Peter's left too in preparation for the harness Prince will wear when he grows up.

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