Continuity mistake: The series doesn't seem sure what Sunny's rank is. He is described at various times both on screen and in the credits as both Detective Inspector and Detective Sergeant.
Unforgotten (2015)
1 continuity mistake in show generally
Starring: Nicola Walker, Sanjeev Bhaskar, Jordan Long, Lewis Reeves
Plot hole: The car was tracked down by finding the original car key on Jimmy's body. If he had stolen the car from the original owner, how did he come to have the original car key?