DRAMA The Serpent

BBC1, 9pm It’s the penultimate episode of the gripping international drama and tensions are running high. Herman and Angela hit another dead end in their investigation, but Herman’s decision to tell their story to the media turns out to be a stroke of genius. Meanwhile, as Charles and Marie-Andrée set up a new home in Paris, Charles’s past returns to haunt him, and his lies begin to be unpicked.