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Diver Sennen is set to explore a Tudor ship wreck off Cornwall, but there's a bumpy start.
BBC Radio 4 Extra
5/5 Simon and Sennen lose contact, and the mystery of Sennen's paternity is revealed.
4/5 Simon proceeds with the day's dive in spite of the weather warnings.
3/5 Sennen is troubled by the shipwreck, while her relationship with Simon changes.