Calling all Agatha Christie fans! The Queen of Crime's iconic characters Tommy & Tuppence are being brought to life by BritBox in a six-part drama starring Imelda Staunton ( Harry Potter, Downton Abbey ), Antonia Thomas ( The Good Doctor ) and Josh Dylan ( The Buccaneers ) – and some exciting names have just been added to the cast. Alex Jennings ( MobLand, The Crown ) and Saffron Burrows ( You ) have joined the series, which is a modern reimagining of Tommy and Tuppence Beresford and comes from the producers behind Happy Valley.

Agatha Christie isn't one of the bestselling authors of all time for no reason. The prolific author has penned a number of timeless and compelling mystery stories, many of which have been adapted for the big and small screen over the past century.

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