around is whatever happened to bob. it's hard. >> reporter: the altmans shared personal photos and the story of bob they've lived and breathed starting with the family disaster that tormented him. >> his mom committed suicide when he was 7 years-old and it was a devastating experience for bob. >> reporter: compounded by bob's strained relationships with his brother douglas and his father seymour. but then, in the 1970s, stewart introduced bob to a young woman and this whole twisted tale was set in motion. >> i was living on east 52nd street on the second floor and kathie was livin' on the third floor, and bob owned the building. he used to come and collect the rent. >> reporter: kathie was kathie mccormack, stewart's young and beautiful upstairs neighbor. >> it was like prince charming