Courtenay John Dayre is drugged by a jealous spy on the night before his loveless marriage to Anthea. His twin, John Courtenay Dayre, reluctantly agrees to impersonate his brother at the wedding, only to discover a genuine affection for his accidental wife. Meanwhile, Courtenay begins to understand the price of things when he realises that his affair has allowed a valuable military secret to be stolen.
| Actor | Role |
|---|---|
 Elissa LandiAnthea Mary Dayre | Anthea Mary Dayre |
 Mona GoyaNatasha Boleska | Natasha Boleska |
| MMarjorie LoringDaphne | Daphne |
| MMuriel MintyLady Pomeroy | Lady Pomeroy |
 Stewart RomeDick Hammond | Dick Hammond |
| WWalter TennysonLord John Courtenay Dayre | Lord John Courtenay Dayre |
| AAlfred TennysonCourtenay John Dayre, Duke of Ardayre | Courtenay John Dayre, Duke of Ardayre |
 Dino GalvaniHunya | Hunya |
| DDavid ParrHugo | Hugo |
| VVincent SternroydHargreaves | Hargreaves |