The Fresh Prince of Bel-Air (1990)

S6E17 The Butler's Son Did It

Geoffrey's world is turned upside down when a man arrives, asserting that he is his long-lost son, effortlessly winning everyone over—except for Will, who uncovers the truth about the newcomer. In another development, Hilary embarks on writing her autobiography, only to stumble upon an old childhood photo that unveils a startling secret.