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Character mistake: Heidi Heatherley is referred to and addressed more than once as Dame Heatherley. Dames (and knights) take the title before the first name, so she should be Dame Heidi. It is surprising that a journalist, in particular, would not know this.

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Character mistake: Noel says that Sam Clarke, the British Prime Minister, is the only head of state who isn't really a head of state because the King is. In fact, the British PM isn't head of state at all, but head of government. And this is common in many countries throughout the world, with a monarch or president as head of state and a prime minister as head of government. The American-style system of an executive president who is both head of state and head of government is in the minority.

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Character mistake: Flight Lieutenant Williams is addressed as "Lieutenant" a couple of times. RAF (or RNZAF) flight lieutenants are always addressed by their full rank.

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Character mistake: The crew deride Garrett's title of Flight Officer, claiming that she can't have it because she hasn't flown in combat. In fact, Flight Officer was a genuine WAAF rank corresponding to Flight Lieutenant. Many RAF officers holding the ranks of Flight Lieutenant, Flying Officer, and Pilot Officer were not aircrew, despite their titles.

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Episode #1.1 - S1-E1

Character mistake: Abigail says that Max is very unusual as a university graduate who has joined the police, and it can't possibly have been his first choice of career. In fact, well over one-third of British police recruits have been graduates since long before Max would have joined.

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Episode #1.3 - S1-E3

Character mistake: Richie Gulliver is referred to as Rory Gulliver on the newspaper headline. As he's supposedly a very well-known Member of the Scottish Parliament, it's unlikely a newspaper would make a mistake like this.

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Show generally

Character mistake: The Captain's medal ribbon bar is sewn onto his uniform back to front, with the 1939-45 Star on his left and the 1939-45 War Medal on his right.

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Show generally

Character mistake: Robertson is usually referred to as Detective Superintendent, but sometimes as Detective Chief Superintendent.

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Show generally

Character mistake: The ship's doctor is sometimes addressed as "lieutenant surgeon" instead of the correct "surgeon lieutenant."

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Show generally

Character mistake: A police officer describes a murder weapon as a revolver. It is an automatic pistol.

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Drive - S6-E2

Character mistake: Scully continually addresses the senior police officer as "Captain." But he wears sergeant's stripes. As a law enforcement officer continually dealing with other law enforcement officers, Scully is not likely to make this mistake. More likely a failure to match script with costume.

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Season 5 generally

Character mistake: Several times Tommy addresses Sir Oswald Mosley as Mr Mosley instead of the correct Sir Oswald. Mosley never corrects him, which given his snobbishness portrayed throughout the series seems highly unlikely.

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Strategy - S5-E3

Character mistake: Mosley says Tommy won the Distinguished Service Medal. This was a naval decoration. Tommy actually won the Distinguished Conduct Medal. Not a mistake someone like Mosley is likely to make.

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Heathens - S4-E2

Character mistake: Ada is listed on the portraits of The Company officers as Mrs Ada Shelby. She is actually Mrs Ada Thorne.

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Episode #1.3 - S1-E3

Character mistake: Luther and Ripley pretend they have not been on the boat and did not find the victim's body as they do not have a search warrant and do not want to compromise the case. However, under English law a police officer may legally enter any premises without a warrant in order to save life, prevent injury or protect property. Since they have a reasonable belief that the victim is being held prisoner on the boat and her life is in danger (as far as they know at that time she is still alive), they don't need a warrant. As experienced police officers, they are bound to know this.

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Episode #1.2 - S1-E2

Character mistake: A number of times the police officers refer to Owen and Terry Lynch as being soldiers and in the Army. They were in the Royal Marines, part of the Navy, and Marines are Marines, not soldiers.

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Episode #1.2 - S1-E2

Character mistake: Owen refers to his own unit as Forty Six Commando. The Royal Marines pronounce the names of commandos as individual digits: Four Six Commando.

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Episode #1.6 - S1-E6

Character mistake: DCS Cornish refers to "Detective Chief Superintendent Schenk." At that time he is a Detective Chief Inspector.

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Episode #33.22 - S33-E22

Character mistake: Charlie says that Iain has been a paramedic for ten years. Iain actually joined as a student paramedic in August 2013 immediately after leaving the Army (in which he was an infantryman, not a medic). As 'Casualty' operates in real time and this episode was shown in February 2019, Iain has therefore been a paramedic for only five and a half years.

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Character mistake: When Jesperson imagines himself as a Mountie his uniform is completely wrong and is not even the right colour. As it was his ambition to join the force and he has photos of RCMP officers in his cab, it seems unlikely that he would imagine himself in a completely incorrect uniform.

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