Blue Murder at St Trinian's

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Blue Murder at St Trinian's
VHS cover
Directed by Frank Launder
Produced by Frank Launder
Sidney Gilliat
Written by Frank Launder
Sidney Gilliat
Val Valentine
Starring Terry-Thomas
George Cole
Joyce Grenfell
Lionel Jeffries
Alastair Sim
Richard Wattis
Lisa Gastoni
Music by Malcolm Arnold
Cinematography Gerald Gibbs
Edited by Geoffrey Foot
Distributed by British Lion Films
Release dates
Running time
86 min.
Country United Kingdom
Language English

Blue Murder at St Trinian's (1957) is British comedy film set in the fictional St Trinian's School. Directed by Frank Launder and written by him and Sidney Gilliat, it was the second of the series of five films and stars Terry-Thomas, George Cole, Joyce Grenfell, Lionel Jeffries and Richard Wattis.


Spiv "Flash Harry" has set up a marriage agency for the Sixth Form and an Italian Prince is interested in meeting the girls. Meanwhile, the father of one of the Sixth Formers is involved in a diamond theft and recklessly decides to hide out at the school.

Cheating in an academic competition so that they can win a 'goodwill' trip overseas to pave the way for the Sixth Form girls to meet the Prince, the girls force the diamond thief to reluctantly masquerade as their headmistress so that he can accompany them on their trip as their 'chaperone'.

Chaos reigns as the St. Trinian's girls run amok in Europe, leaving a string of victims in their wake as they win by underhanded means at hockey in France and at water polo in Italy.


Flash Harry Edwards (George Cole) has set up a marriage bureau for the sixth form St. Trinian's girls and is in Rome negotiating with Prince Bruno (Guido Lorraine), who is interested in marrying one of them. The Prince suggests that Harry bring the girls to Rome before July, at the Prince's expense, so he can make a decision. Coincidentally, UNESCO is offering the best academically qualified school in England an expenses paid bus tour to various European cities, ending in Rome: they will play at the Vienna Music Festival and play in a series of field hockey and water polo matches against school teams. Of course, St Trinian's is the last possible candidate for the tour. Harry returns with the news of the Prince's offer, but is at a loss how to get the girls to Rome before their term ends in July. The UNESCO tour provides the solution, when the girls break into the Ministry of Education in London and replace their file with one reporting their outstanding academic qualifications, assuring they will be chosen.

At St. Trinian's, with neither a headmistress nor teachers, chaos reigns. Things are so bad that an army unit, headed by Major Whitehart (Thorley Walters), has been called in to restore order; but the best they can do, while suffering debilitating casualties, is to confine the mischief to the school. Meanwhile, Culpepper Brown (Eric Barker) at the Ministry of Education has hired a new headmistress, Dame Maud Hackshaw (Judith Furse), who is on her way from Australia.

Further complications develop when Joe Mangan (Lionel Jeffries), who has just made a large diamond heist and is on his way by train to St. Trinian's to visit his daughter Myrna (Lisa Gastoni), is recognized by his former prison governor. After Mangan leaves the train, the former prison governor reads a newspaper account of the theft, which has all the hallmarks of Mangan's approach, and alerts the police of Mangan's whereabouts. Mangan, while walking to the school, stops to ask directions at a parked car, where he finds Superintendent Kemp-Bird (Lloyd Lamble) having a tryst with his fiancée Police Sergeant Ruby Gates (Joyce Grenfell). Mangan reaches St. Trinian's well before Kemp-Bird returns the car radio to the police frequency and realizes that the stranger they saw was Mangan. Mangan reaches the school grounds, meets his daughter and tells her he has done a "small" job. They reach Harry's campus lodge residence, when police cars are spotted heading there, and the sixth form girls, lead by Bridget Strong (Dilys Laye), decide to hide Mangan in the school. The police arrive just as the army is withdrawing because Dame Maud will arrive shortly to take control of the school. When Dame Maud arrives, she is kidnapped by the girls and hidden, shackled, in the bell tower. Mangan, disguised in women's clothes, becomes the new headmistress, unable to escape because the police have surrounded the school and plan to stay there indefinitely. The girls intercept a rescue note sent to the Ministry by Dame Maud and replace it with a forged letter insisting the girls go on the tour. The Ministry has no alternative but to comply.

The Superintendent, criticized by his superior for having bungled the search for Mangan, is in danger of losing his job. He thinks that Mangan is at the school and plans to leave with the tour. He decides to send Gates, undercover, along on the tour as an interpreter. Culpepper Brown assigns Manton Bassett (Richard Wattis) to deal with the problem of transportation. When no London bus company will take the job Bassett, in desperation, calls Kemp-Bird for help. He reports back that no local company will do it except, possibly, the Dreadnought Motor Transport Co., whose phone is disconnected, and may be so needy that they will take the job. Dreadnought owner Captain Romney Carlton-Ricketts (Terry-Thomas), agrees to rent the Ministry two dilapidated buses. As the buses arrive at St. Trinian's, Cynthia (Jose Read) spies Mangan stuffing the diamonds into the water polo ball, but doesn't tell anyone. Also traveling with the girls are Eric the liftman (Michael Ripper), the only Ministry representative who would go, and Gates posing as interpreter Ursala Bluit. Harry leads the entourage in his own car, accompanied by three sixth form girls, to whom he reveals Gates identity. On the boat to France, the impoverished and opportunistic Ricketts begins to make a play for Gates, thinking she will come into a small inheritance when her granny dies.

By the time they reach Rome, Gates has told Ricketts about her engagement, her real identity, and her mission. In Rome, just before the water polo match, Mangan retrieves the gem-filled ball, but one of the girls takes it back. Cynthia, believing Prince Bruno will choose her, tells Harry about the loaded ball. At the match, Mangan takes the ball, insisting that the girls use the ball provided by the Italian team. During the match, the empty ball is thrown out of the pool, caught by Harry, and replaced by the gem-laden ball. Harry, believing he has the loaded ball, runs off with it to the police, finds the ball empty, and returns to the match. When the ball with the diamonds is thrown out of the pool, Mangan runs off with it, with Harry and the fourth form girls in pursuit. The girl's team leaves the pool and Prince Bruno makes it clear that his choice of bride is Myrna Mangan. Mangan hides in the Coliseum, but is found by the girls. At a press conference to announce his wedding to Myrna, Prince Bruno is hit in the eye by a piece of fruit thrown, as revenge, by Cynthia.

Back at St. Trinian's, Amelia Fritton (Alastair Sim) has been restored as headmistress and, reward check in hand, is greeted warmly by the returning girls. She then agrees to pay Harry his percentage. Sergeant Gates finds that Kemp-Bird is now a beat cop, says goodbye to a chagrined Ricketts, and runs off his bus to chase Kemp-Bird down he street.


Sixth Form

Ministry of Education


As Miss Fritton, Sim appears in only two scenes.

A leading model at the time, Sabrina got high billing, appearing in all the posters and publicity stills in school uniform, but she actually had a non-speaking part in which she was only required to lounge in bed reading a book while men hovered around her. She is described as the "school swot", the only pupil to go to bed on time and where she reads the works of Dostoyevsky.

Thorley Walters was to re-appear in The Pure Hell of St Trinian's, effectively replacing Richard Wattis as Culpepper-Brown's nerve-racked assistant. He was also to play the part of Culpepper-Brown himself in The Wildcats of St Trinian's in 1980.

It was Rosalind Knight's first credited film role. She too would later appear in The Wildcats film, this time as a teacher.

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