>> when joe came and watched bobby perform, i think it was an extraordinary moment for joe in understanding that the runt of his litter, bobby, was as tough and as smart as he was. and for bobby, it was winning the paternal acknowledgment that he had spent his life trying to get. >> as bobby's reputation grows, a young politician decides to join him at the hearings. >> at the time, john f. kennedy is the pretty undistinguished senator, one with great ambition. he becomes part of that investigation and really distinguishes himself thanks to his younger brother. >> mr. hoffa, this bill is not a strike breaking, union busting bill. you're the best argument i know for it. your testimony here this afternoon, your complete indifference to the fact that numerous people -- >> it makes jack look tougher. he's not just an effete playboy. he's chasing the mob. so this is good publicity for the kennedys. >> jack receives another boost. after a miscarriage and a still birth, jackie gives birth to their first child.