THE INSIDER:

In 1981, my sitcom "Mork & Mindy" was about to enter its fourth and final season. The show had run its course and we wanted to go out swinging. The producers suggested hiring Jonathan to play my son, who ages backward. That woke me out of a two-year slump. The cavalry was on the way.

Jonathan's improvs on "Mork & Mindy" were legendary. People on the Paramount lot would pack the soundstage on the nights we filmed him. He once did a World War I parody in which he portrayed upper-class English generals, Cockney infantrymen, a Scottish sergeant no one could understand and a Zulu who was in the wrong war. The bit went on so long that all three cameras ran out of film. Sometimes I would join in, but I felt like a kazoo player sitting in with Coltrane. [...]

Earlier in his life, he had a breakdown and spent some time in a mental institution. He joked that the head doctor told him: "You can get out of here. All you need is 57 keys." He also hinted that Eileen wanted him to stay there at least until Christmas because he made great ornaments.

Even in his later years, he exorcised his demons in public. His car had handicap plates. He once parked in a blue lane and a woman approached him and said, "You don't look handicapped to me."

Jonathan said, "Madam, can you see inside my mind?"

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