The Cat in the Hat circumstances" which is soon enhanced by make believe. The book starts in a factual, realistic world, which crosses over into the world of make believe with the loud bump that heralds the arrival of the Cat. However, this is the first Dr. Seuss book in which the fantasy characters, i.e. the Cat and his companions, are not products of the children's imagination. It also differs from previous books in that Sally and her brother actively participate in the fantasy world; they also have a changed opinion of the Cat and his world by the story's end. Ruth MacDonald asserts, ""The
The Grinch Grinches the Cat in the Hat died a few months before this special had aired. Boris Karloff, the original voice of the Grinch, had died in 1969), while Mason Adams took over voicing the Cat in the Hat from the late Allan Sherman, who died in 1973. Since Friz Freleng was absent from production on "The Pink Panther" special "" due to his departure from DePatie–Freleng Enterprises to return to Warner Bros. Animation, this was the only other fully animated DFE production to be made by Marvel Productions and one of the last DFE cartoons Freleng was involved in. The special was first released on VHS