A chance for younger viewers to see this award-winning series.
Cameraman Sid Perou penetrates the mysterious world where TV has never been before - Dow Cave. Dow cave, near Kettlewell, has the worst accident record in British caving. Harry .Long, an underground rescue team leader on year-long standby, takes us through a series of hazards to show why.
Film editor MARTIN WINTERTON
Executive producer DOUGLAS B. SMITH