THE SINNER | BBC4 9PM

The series continues its double-bill instalments, and tonight Cora’s suppressed memories begin to emerge – though rather unhelpfully in a bit of a hotchpotch fashion. Snippets of her subconscious reveal a recurring wallpaper pattern, a nightclub, going down some steps… but what the heck does it all mean? Harry’s on a mission to prove that something – or someone – caused Cora to do what she did. But unfortunately for him, time is not on his side…