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Episode #4.2 - S4-E2

Factual error: Ram says he has two "Chief Constable's Commendations" (which are also shown on his office wall). He has spent his entire career in the Metropolitan Police, which has a Commissioner instead of a Chief Constable.

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Season 2 generally

Factual error: Both detective superintendents always wear uniform, which is only worn by detectives on very formal occasions if at all. Both also wear collar badges, which are not worn by either the Metropolitan Police or Thames Valley Police, the forces to which they belong.

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Show generally

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.

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