what happens when Bart has an evil twin the sub episode starts with Bart and Lisa hearing weird noises from the attic but their parents just shrug it off curious of their parents' weird reaction the kids spy on Homer and discover he's feeding something still not satisfied they sneak into the attic where they see a scary figure with a monal laugh the kids run for their lives not realizing that the thing also escapes without a choice Homer and Marge called Dr Hibbert and revealed their secret apparently Bart has a Siamese twin Hugo but he's pure evil
so Dr Hibert separated them still margin Homer kept the other twin and treated him in the most humane way chain Hugo up in the attic like an animal and fed him a bucket of fish heads once a week everyone then searches for Hugo except for Bart unfortunately Hugo never left he ties up Bart so we can sew them back together fortunately Dr Hibert arrives and knocks out Hugo however he soon realizes that Hugo's scar is on the left side which means the evil twin was and always will be Bart oh don't look so shocked to
settle this The Simpsons take in Hugo and put Bart in the Attic so now you know