While loosely based on the Burglar novels by Lawrence Block, two of the principal characters underwent major changes: Bernard "Bernie" Rhodenbarr, a white male bookstore owner/burglar, became Bernice "Bernie" Rhodenbarr as played by Whoopi Goldberg; lesbian dog groomer Carolyn Kaiser, Bernie's best friend, became straight dog groomer Carl Heller and was portrayed by Bobcat Goldthwait.