Playing a couple should be no trouble for real-life husband and wife Matthew Macfadyen and Keeley Hawes... or so you’d think.
They have been married for 18 years and their relationship is the envy of the TV industry.
But they had to cast aside loyalty and devotion for the new three-part series about love cheat Labour MP John Stonehouse, who faked his own death, ran off with his mistress and was later exposed as spying for the Czechs.