There are two great mothers in this talky, dated, but still endearing “issue movie” about inter-racial marriage from 1967. Katharine Hepburn’s real-life niece Katharine Houghton plays her daughter and what Houghton lacks in screen presence and acting experience is less important than the genuine connection and palpable affection between the two of them. The question may seem quaint now, but as filming was underway, inter-racial marriage was still illegal in 17 states. The Supreme Court ruled those laws unconstitutional that same year. Hepburn is electrifying in what she knew would be her final film with her most frequent co-star and real-life great love, Spencer Tracy. And the distinguished actress Beah Richards is brilliant as the mother of a son who says his father thinks of himself as a “colored man,” while he just thinks of himself as a man. Watch for: Hepburn’s expression as her daughter describes falling in love.