His death was confirmed by the talent agent Nigel Mikoski, who represented Mr. Thicke. He died of a heart attack, Carleen Donovan, a publicist for one of his sons, the singer and songwriter Robin Thicke, said in an email.
Mr. Thicke had a genial warmth that he projected across all of his television work, most memorably on “Growing Pains,” which ran from 1985 to 1992. He played a psychiatrist, Dr. Jason Seaver, a classic 1980s formulation of the reassuring father, and solved everyone’s problems with a warm homily by the end of each 30-minute episode.

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