Parallel stories: 18th century Harrison builds the marine chronometer for safe navigation at sea; 20th century Gould is obsessed with restoring it.

Michael Gambon
as John Harrison

Jeremy Irons
as Rupert Gould

Ian Hart
as William Harrison (Adult)

Andrew Scott
as John Campbell

Bill Nighy
as Lord Sandwich

Gemma Jones
as Elizabeth Harrison

John Wood
as Sir Edmund Halley

Anna Chancellor
as Muriel Gould

Brian Cox
as Lord Morton

Samuel West
as Nevil Maskelyne
Peter McGinn
I had known about this 3-hour long, two part made-for-tv movie for a long time, but it took me a while to get around to watching it. It is very well done, so that even though the dual plots move slowly and with a lot of detail, it kept my interest throughout. It is hard to believe what John Harrison...