Diff'rent Strokes (1978)

S02E09 The Adoption (2)

Mr. Drummond's plans to adopt Arnold and Willis face a serious setback due to a scheming junk dealer. Determined to change their fate, the boys decide to take action themselves. Guest-starring Whitman Mayo as Jethro Simpson, a "long-lost relative," he shows up with a letter that claims to be from their father, putting Arnold and Willis's future in his hands.