The Cat in the Hat (TV special) stopped working on Seuss projects also. DePatie and Freleng were credited together as executive producers, while Jones was credited as producer with Seuss (under his actual name). For the next three Dr. Seuss animation specials, Freleng and Seuss (again using his real name) were credited as producers, although separately. DePatie–Freleng animated a new Cat in the Hat Productions logo for this special, which would be used in the next three specials. The pace and rhyming sequences of several of the songs (particularly "Calculatus Eliminatus") led many to believe that they were composed by Sherman, since they closely resemble his earlier
The Cat in the Hat (film) character was designed by Steve Johnson. The Cat costume was made of angora and human hair and was fitted with a cooling system. To keep Myers cool during the outdoor shoots, a portable air conditioner was available that connected a hose to the suit between shots. The tail and ears were battery operated. The Fish was considered somewhat of a unique character for Rhythm & Hues (responsible for some of the effects and animation in such films as "Cats & Dogs", "", and "Scooby-Doo"), in that the character had no shoulders, hips or legs, so all of the physical performance