Science Ninja Team Gatchaman (1972) : 3x25

One of Egobossler's old friends and colleagues Oncain, is also the last man on Earth who knows Count Egobossler's deep, dark secrets. The Kagaku Ninjatai get to Oncain first and try to convince him to stay away from Egobossler, but the man will have nothing of it. He invites the Team to go fox-hunting and with his two children, Michael and Mary, and as they're distracted, arranges to meet with Egobossler. The inevitable showdown with Egobossler and his special Skyrider command is spectacular, but even Ken and Joe at their best can't prevent Ego from gunning down his man. Joe comes round the corner just in time as Ego shoots Oncain right before Michael and Mary's eyes (triggering a flashback where you almost see the faces of Joe's parents). In the final scene, Joe kneels down and has a little heart-to-heart talk with Michael. You don't hear what he says, only Michael's reactions.