John Harrison
Michael Gambon
John Harrison

The fascinating story of John Harrison who, in the 18th century, believed he could make a clock that would work on board a ship—and so solve the problem of finding longitude at sea.
John Harrison
Michael Gambon
John Harrison
Rupert Gould
Jeremy Irons
Rupert Gould
Elizabeth Harrison
Gemma Jones
Elizabeth Harrison
Muriel Gould
Anna Chancellor
Muriel Gould
Laura Gurney
Emma Kay
Laura Gurney
Dodo Gould
Barbara Leigh-Hunt
Dodo Gould
John Jefferies
Peter-Hugo Daly
John Jefferies
Sir Frank Dyson
Alec McCowen
Sir Frank Dyson
Lieutenant (uncredited)
Kevin Hudson
Lieutenant (uncredited)
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