Tried to raise money to make a sequel to Charly (1968) and even shot a 15-minute portion of it.
Was a well-known sailplane pilot, and was also the voice in the "Running On Empty" documentary video about the Barron Hilton Cup, a prestigious soaring competition.
Was responsible for unraveling a major studio fraud in the 1970s which led to the downfall of powerful Columbia Pictures president Begelman, David. The morality of Hollywood was such that it did more short-term harm to Robertson's career than to Begelman's, who soon after was hired to run MGM. The full story is told in David McClintick's 1982 bestseller, 'Indecent Exposure.'.