Mongo, a pit mix with such severe separation anxiety that forced him to break though the roof to escape from his wrought iron enclosure. NASA Astronauts Suni Williams and Leland Melvin who work together on the international space station and have problem dogs: Suni's Gorby, a Jack Russell terrier who attacks bigger dogs including Leland's Rhodesian Ridgeback mixes, Jake and Scout. However, Jake also will try to bite anyone who approaches Leland.