The supernatural spy thriller The Rook, airing with eight episodes on Starz, follows Myfanwy Thomas (Emma Greenwell), a woman who wakes up at London’s Millennium Bridge with no memory and no way to explain why she’s surrounded by a circle of dead bodies. While trying to piece her memories back together and figure out why she’s a target, she returns to the Checquy, where she’s a high-ranking official in what amounts to a secret service for people with paranormal abilities, in order to find answers about her own troubled past and to understand what she’…