Patriot Games (1992)

Jack Ryan, the hero of Tom Clancy's techno-thriller series, returns in the sequel to _The Hunt for Red October_. Ryan is on vacation in England when he spoils an assassination attempt on an important member of the Royal Family. Ryan gets drawn back into the CIA when the same splinter faction of the IRA targets him and his family.
Jack Ryan and his family are vacationing in England. Quite by accident, Ryan thwarts a terrorist attack - outside Buckingham Palace on Lord Holmes, a member of the royal family - by a splinter IRA group, killing the younger brother of one of the terrorists. Retuning to the U.S. with his family, Ryan thinks that's the end of the matter. But the terrorist won't let the matter rest and he won't stop until he's had his revenge.

His days as an intelligence agent behind him, former CIA analyst Jack Ryan has traveled to London to vacation with his wife and child. Meeting his family outside Buckingham Palace, Ryan is caught in the middle of a terrorist attack on Lord Holmes, a member of the Royal Family. Ryan helps to thwart Holmes' assailants and becomes a local hero. But Ryan's courageous act marks him as a target in the sights of the terrorist whose brother he killed. Now Ryan must return to action for the most vital assignment of his life: to save his family.