The story of a love triangle between a conservative English aristocrat, his mean socialite wife and a young suffragette in the midst of World War I and a Europe on the brink of profound change.
| Actor | Role |
|---|---|
 Benedict CumberbatchChristopher Tietjens | Christopher Tietjens |
 Rebecca HallSylvia Tietjens | Sylvia Tietjens |
 Adelaide ClemensValentine Wannop | Valentine Wannop |
 Miranda RichardsonMrs. Wannop | Mrs. Wannop |
 Roger AllamGeneral Campion | General Campion |
 Rupert EverettMark Tietjens | Mark Tietjens |
 Janet McTeerMrs. Satterthwaite | Mrs. Satterthwaite |
 Tom MisonPotty Perowne | Potty Perowne |
 Stephen GrahamVincent MacMaster | Vincent MacMaster |
| SSasha WaddellGlorvina | Glorvina |