Rex Banner is a U.S. Treasury officer in Washington, D.C. who was briefly sent to Springfield to uphold Prohibition in Springfield after Bart got drunk in a live news report, which incited several women to force the city government to declare Prohibition. He replaced Clancy Wiggum as Chief of Police and made a main objective to capturing the "Beer Baron", a rum-runner who was actually Homer. He also tried interrogating people in regards to who is supplying rum on the side, but his choice of words for his interrogation (Listen, rummy, I'm gonna say it plain and simple. Where'd you pinch the hooch? Is some blind tiger jerking suds on the side?) left one of his interrogatees, Barney Gumble, confused and could only reply with an unsure "Yes?". Also, despite being more competent than Wiggum, Banner seems to be somewhat corrupt, as he doesn't even mind Fat Tony smuggling heroin after refusing to take any bribes to let Fat Tony smuggle alcohol to Springfield. When Homer was finally turned in by Wiggum, Rex was fired, both from his job as chief, and from the main mechanism of punishment for breaking the ancient prohibition law: catapult. 
Though a very clean cut, non-nonsense officer, he did not seem to be any more effective then Wiggum as police chief. Banner was never able to identify Homer as the "Beer Baron". Even with overwhelming evidence, and Homer's general sloppiness in covering his own tracks.
Behind the Laughter
Rex Banner was based on Eliot Ness, the Treasury agent who led the famous Prohibition-enforcement team "The Untouchables". His voice is based on Robert Stack's portrayal of Ness in the Untouchables TV series. His appearance is based on Kevin Costner's portrayal of Ness in the Untouchables film.
- Episode – "Homer vs. the Eighteenth Amendment"
- – The Simpsons Movie (Cameo)
- Video game – The Simpsons: Tapped Out
The Simpsons Characters
|The Simpsons and relatives|
| Homer Simpson • Marge Simpson • Bart Simpson • Lisa Simpson • Maggie Simpson|
Santa's Little Helper • Snowball II • Abraham Simpson • Patty Bouvier • Selma Bouvier • Mona Simpson • Jacqueline Bouvier • Ling Bouvier • Herb Powell
|Jasper Beardly • Comic Book Guy • Barney Gumble • Maude Flanders • Ned Flanders • Professor Frink • Gil Gunderson • Julius Hibbert • Lionel Hutz • Helen Lovejoy • Reverend Timothy Lovejoy • Captain Horatio McCallister • Akira • Hans Moleman • Marvin Monroe • Bleeding Gums Murphy • Apu Nahasapeemapetilon • Mayor Joe Quimby • Dr. Nick Riviera • Agnes Skinner • Cletus Spuckler • Disco Stu • Squeaky-Voiced Teen • Moe Szyslak • Sam and Larry • Kirk Van Houten • Luann Van Houten • Clancy Wiggum • Eddie • Lou • Crazy Cat Lady • Lindsey Naegle • Cookie Kwan • Wiseguy • Brandine Spuckler • The Yes Guy • Sanjay Nahasapeemapetilon • Blue-haired Lawyer • Judge Roy Snyder • Rich Texan • Luigi Risotto • Old Jewish Man • Mrs. Glick|
|Itchy & Scratchy • Kent Brockman • Krusty the Clown • Troy McClure • Sideshow Mel • Rainier Wolfcastle | Arnie Pye • Radioactive Man • Duffman • Bumblebee Man • Bill and Marty • Drederick Tatum • Mr. Teeny • Scott Christian • Booberella • Gabbo • Lurleen Lumpkin • Celebrities|
|Springfield Elementary School faculty and students|
|Superintendant Chalmers • Seymour Skinner • Edna Krabappel • Elizabeth Hoover • Groundskeeper Willie • Otto Mann • Lunchlady Doris • Dewey Largo • Dr. J. Loren Pyror • Milhouse Van Houten • Ralph Wiggum • Nelson Muntz • Martin Prince • Rod Flanders • Todd Flanders • Sherri and Terri • Wendell Borton • Database • Jimbo Jones • Kearney Zzyzwicz • Dolph Starbeam • Üter Zörker • Janey Powell • Lewis • Richard • Bashir bin Laden|
|Springfield Nuclear Power Plant|
|Charles Montgomery Burns • Waylon Smithers • Carl Carlson • Lenny Leonard • Charlie • Blinky|
|Snake Jailbird • Kang & Kodos • Herman • Sideshow Bob • Fat Tony • Frankie the Squealer • Johnny Tightlips • Legs and Louie|
|The Simpsons • The Bouviers • The Flanders • The Van Houtens • The Wiggums|
|Fictional characters • One-Time Characters • LGBT characters • Parodied celebrities • Animals|