Glorious 39 (2009)

A mysterious tale set around a traditional British family on the eve of World War Two. Oblivious to the looming shadow of World War II, the wealthy Keyes maintain a confident façade in the British countryside until daughter Anne becomes an unexpected pawn. Her accidental discovery of secret recordings creates a rift in the family.
Stephen Poliakoff, Sue Hills
Romola Garai, Bill Nighy, Julie Christie, Eddie Redmayne, Juno Temple, David Tennant, Charlie Cox, Jeremy Northam, Christopher Lee, Corin Redgrave, Hugh Bonneville, Jenny Agutter, Sam Kubrick-Finney, Toby Regbo, Muriel Pavlow, Tom Goodman-Hill, Richard Cordery, Ryan Kiggell, Anthony Flanagan, Jason White, Nicholas Blane
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