What if you woke up one morning and found out that your mother had been a spy during World War II? Would you not be hugely curious about that? Would you not feel incredibly driven to learn what exactly went down? Well, that is exactly what this two-part miniseries hinges on -- a daughter finds out her mother was a spy during the Second World War. The miniseries features a good cast including Charlotte Rampling, Michael Gambon, Hayley Atwell, Michelle Dockery, and Rufus Sewell. Tonight is the first part, and we'll all get to see part two next Friday.