Season 17 · Episode 71 of 82
Aired May 21, 1981
Episode 71
Thu, May 21, 1981
0 of 82 watched this season
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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Airs
Thu, May 21, 1981
Show
Blue Peter
2050 episodes
Episode
S17 · E71
in Blue Peter