The actress plays her real-life grandmother, a widow who uncovers a mysterious and secret life following the death of her husband.

It first aired on BBC One in the United Kingdom on 27 November 2018[3] and debuted in the United States on PBS Masterpiece on 31 March 2019.

[5] In 1963, Alison Wilson's happy home life is shattered upon the death of her husband, novelist and former MI6 officer Alexander "Alec" Wilson.

Everything she knew about her husband of 22 years quickly unravels when she discovers she is not the only Mrs Wilson.

She tries to shield her two sons as she reconciles her marriage with her husband's activities as a foreign intelligence officer.