who had wanted to start a new animation unit independent from Ising, then gave Hanna and Barbera permission to pursue their cat-and-mouse idea. The result was their most famous creation, Tom and Jerry. Modeled after the Puss Gets the Boot characters with slight differences, the series followed Jerry, the pesky rodent who continuously outwitted his feline foe, Tom. Hanna said they settled on the cat and mouse theme for this cartoon because "we knew we needed two characters. We thought we needed conflict, and chase and action. And a cat after a mouse seemed like a good, basic thought." The revamped characters first appeared in 1941's The Midnight Snack. Over the next 17 years, Barbera and Hanna worked exclusively on Tom and Jerry, directing more than 114 popular cartoon shorts. During World War II, they also made animated training films. Tom and Jerry relied mostly on motion instead of dialog. Despite its popularity, Tom and Jerry has often been criticized as excessively violent. Nonetheless, the series won its first Academy Award for the 11th short, The Yankee Doodle Mouse (1943)—a war-time adventure. Tom and Jerry was ultimately nominated for 14 Academy Awards, winning 7, more than any other animated series featuring the same characters. Tom and Jerry also made guest appearances in several of MGM's live-action films, including Anchors Aweigh (1945) and Invitation to the Dance (1956) with Gene Kelly, and Dangerous When Wet (1953) with Esther Williams. In addition to his work in animated cartoons, Barbera and Tom and Jerry layout artist Harvey Eisenberg moonlit to run a comic book company named Dearfield Publishing. Active from 1946 to 1951, Dearfield's titles included "Red" Rabbit Comics, Foxy Fagan, and Junie Prom. Quimby accepted each Academy Award for Tom and Jerry without inviting Barbera and Hanna onstage. The cartoons were also released with Quimby listed as the sole producer, following the same practice for which he had condemned Ising. Quimby once delayed a promised raise to Barbera by six months . When Quimby retired in late 1955, Hanna and Barbera were placed in charge of MGM's animation division. As MGM began to lose more revenue on animated cartoons due to television, the studio soon realized that re-releasing old cartoons was far more profitable than producing new ones. In 1957, MGM ordered Barbera and Hanna's business manager to close the cartoon division and lay off everyone by a phone call. Barbera and