Eighty-year-old Joan (Judi Dench) is beyond anyone’s suspicion when she is arrested for treason, accused of having passed state secrets to the KGB for forty years. We watch as her younger self (Sophie Cookson) becomes involved with Communist factions at university, connections that only become more complex as she starts working on the nuclear weapons programme. Based on a true story, this is a pertinent tale of the risks we take when we marginalise and underestimate women, as well as grippingly spun story of spy intrigue.
