Lucky Luke Vol. 64: The Wedding Crashers
Samuel Parker, ageing sheriff of Hadley City, is about to get married, and he's promised his bride to retire after the ceremony. But Parker once sent the Daltons to jail, and when the horrible brothers hear the happy news, they escape with the intent of killing Samuel right in the middle of his wedding. Fortunately, Lucky Luke is an old friend of the sheriff's, and he has been invited to the celebrations!