As close to perfection as a Doctor Who story can get. I has a slow burn to ramp up tension until the hopelessness and the horror reach it's peak. Cole comes off as an extremely likeable and flawed character with him trying to do the right thing but ultimately making everything worse. Jacobi takes a backseat in this one but he uses his screentime well to portray the masters as a cunning manipulator. This requires to listen to the mediocre The Good Master before this but it's worth it to hear this harrowing tale