Old Duteronomi. In the musical Cats, old Duteronomi is a cat sent to Heaviside. Heaviside is a fictional cat paradise where the souls of cats go after death. Old Duteronomi was a gentle and loving old cat. He always loved the cats in every possible way while he was alive, and would do anything for their happiness at any cost. At the end of the plot, old Dutronomi and his cats went to Heaviside through the "Jellie Gate". After they left, the old cat Grotowski who stayed in the real world was very sad. Finally, Decided to return to "Jerry's Gate" to follow his beloved cat.