The Caper of the Golden Bulls, also known as Carnival of Thieves, is a 1967 film directed by Russell Rouse. It stars Stephen Boyd, Yvette Mimieux, and Giovanna Ralli.
Churchman moves to Spain, where he opens a successful restaurant. He and another American expatriate, Grace Harvey Mimieux, are in a romantic relationship. Life is idyllic until one day Angela Tresler Ralli, an acquaintance from the war, turns up threatening to expose Churchmans illegal activity unless he and his crew pull off a daring robbery for her in Pamplona.During the fiesta, Churchmans men carry concealed explosives and tools during the famed Running of the Bulls, veering off into an alley during the event. Churchman has broken into a bank and, using the dynamite, he blows open a safe, timing the explosion with a cannons shot that is a traditional rite during the festival. ........
Source: Wikipedia