When an unassuming elderly widow is arrested for treason, her tangled secret past as the KGB's longest-serving British spy is exposed. Nina Sosanya, Judi Dench, Stephen Campbell Moore, Tom Hughes, Sophie Cookson, Ben Miles, Robin Soans, Tereza Srbova, Kevin Fuller, Freddie Gaminara, Robin Soans, Sophie Cookson, Stephen Campbell Moore, Judi Dench, Tom Hughes, Tereza Srbova, Nina Sosanya, Kevin Fuller, Ben Miles, Freddie Gaminara, Trevor Nunn Added on Netflix 2023-04-19. Youtube Trailer