A stylish thriller set in the modern world of toxic friendships, The Guest recently made its BBC debut on September 1 and has left viewers stunned with its furious episode. Starring Torchwood icon Eve Myles, best known for her role as Gwen Cooper in the Doctor Who spin-off, the series follows a cleaner who "becomes captivated by her wealthy employer's charismatic influence." Their unlikely friendship grows, revealing shocking secrets as "their relationship spirals into a dangerous psychological game where nothing is quite what it seems."