2x20 - My Wife and Kids

Michael freaks out when he spots a gray hair, but not on his head. He feels he's getting too old, and decides to practice boxing again to get in shape. He even teaches Jr. some tricks and some punches, until Jr. knocks Michael out, giving him a black eye. Meanwhile, Claire is ready to go on her first date with Tony, and Jr. mishears their conversation and thinks they're having sex. He decides to defend his sister and confronts Tony, who gives him a black eye. But it all turns out fine after the situation is cleared.