999

Episode 3 (4x3)

Air date: Jun 29, 1993

This week: how a Sunday-afternoon stroll turned into a desperate struggle against time and tide. Two potholers get into trouble while negotiating the "black hole" 500 feet beneath the Mendip Hills. Two men on a fishing trip are at the centre of a massive search and rescue operation in the Bristol Channel. And how a Somerset farmer fought his way back to health after a tractor accident left him with a broken back.