Jimmy is becoming used to his life as a 'trapper'. When he hears his brother - Benjamin - and an older miner called William approaching with a coal cart he opens his trap door as usual to let them through.
Suddenly they hear a trickle of water and the shaft begins to flood.
They are unable to open the trap door so they have no option but to follow the water towards its source.
Jimmy and Benjamin struggle against the flood until they eventually make it to the surface, exhausted but alive.
A crowd has gathered at the mine and Jimmy and Benjamin learn that a sudden summer rainstorm has flooded the mine, drowning many workers including several children.
Images reproduced with kind permission from the The National Coal Mining Museum for England.
A collection of programmes to download as mp3 files at any time. Includes dance and music.
See all School Radio and other Learning podcasts available from the BBC Podcast Directory.
We are always pleased to receive your feedback, suggestions and pupils' work.
Join Jarvis Cocker on Radio 4 to remember the long-running School Radio series 'Singing Together'.
Commemorate 100 years since WW1 by staging our specially-written play 'Archie Dobson's War'.
All 13 episodes of Michael Morpurgo's moving WW1 story are available to listen to online.
Notes to support the programmes including details of all the series content.