He reveals to her that he is not really a spy, but he makes money smuggling manuscripts of books by Soviet dissidents to the West. Because the Soviets want to get their hands on him, they plant evidence in his hotel room indicating that he is one of their spies. Special Branch arrest him and agree to a new prisoner exchange, over Fabienne's protests. The final exchange on a lake on the East German border descends into chaos and a motor boat chase. It was shot at Twickenham Studios and on location in London, Loch Leven and in Bucharest. The school football match was shot at Vincent Square. The film's sets were designed by the art director Carmen Dillon. It was made as a co-production between several companies including Kirk Douglas's own Bryna Productions. The "gunboats" in the movie were:- Lalage, a 70 ft WW2 Fairmile harbor defense launch, the East German boat, and the Calshot Salar, a 60 ft WW2 Royal Air Force "three leg" pinnace, the British boat. Lalage was owned and operated by Captain Jack Glover of Dumbarton, who in addition was an extra in the movie, as was his brother Hans Glover. Tragically, Captain Glover drowned in 1982 while undertaking a boat salvage operation in the river Leven. Lalage eventually foundered off the Little Cubrae island after striking rocks during a severe storm and became a total loss. Calshot Salar, was owned by Dr W."bill" Souter and operated during filming by a Canadian, Captain Robin Blair Crawford, who also had a position as an extra in the movie and in addition was the lead safety diver at Loch Etive. At the insistence of her owner Calshot Salar had her original RAF number painted on the hull for the movie. After numerous adventures in both home and overseas waters Calshot Salar was sold and eventually became a houseboat at Shoreham. "TV Guide" wrote the film "features a good cast, an exciting speedboat chase, a few chuckles, and every spy cliche in the book"; and "Radio Times" noted "a sometimes clever and witty script by the ace TV team of Dick Clement and Ian La Frenais. However, it's rather let down by Clement's uncertain direction. Another problem is that, as a Bucharest waiter who is actually a spy, Kirk Douglas's peculiar intensity isn't best suited to a comedy. Trevor Howard and Tom Courtenay seem more at home with the spy spoof material."