Whitstable Pearl S02E02 - Night Terrors

Mike has broken his ankle and, laid up at home, begins to be disturbed by a man in a flat opposite who has violent night terrors. Mike becomes convinced that the night terrors are a cover for him planning to murder his wife. The police find no evidence to support this, so Mike hires Pearl to investigate further. She discovers a body, but it's not the person she and Mike were expecting.