The series is based on the popular New York Times bestselling book series collectively known as The Expanse,  written by Daniel Abraham and Ty Franck (under the pen name James S. A. Corey). Abraham and Franck will be show producers.
A tortoiseshell cat is a coat color where the cat is a molted brown cat with black, reddish, or orange patches. They can also have white paws. Tortoiseshell cats have unique genetics. The vast majority of tortoiseshell cats are female, because two X chromosomes are required to produce black, gold and orange coloring.
Cats that have random patches of different colors are known as tortoiseshell (tortie), if the markings are tabby, the cats are called patched tabbies (torbie). Mackerel, spotted, ticked or classic markings can show in the patches, and the tabby pattern usually shows more distinctly on the head and legs.