Star Trek: The Next Generation - Season 6 Episode 15 -

Captain Picard incurs serious wounds in a fight, even his artificial heart is gravely damaged. While Dr. Crusher wrestles with the medical consequences, his mind meets Q, who presents him to a parade of people who fell victim to Picard's actions and neglects, from his father and fellow cadets to himself, and offers him the possibility to have a 'second chance' without causing disaster by upsetting time. After Picard's initial refusal claim to have no regrets, Q forces him to acknowledge he made stupid mistakes and fix at least the adolescent one that got him stabbed ...