In '100 Miles to Go', hosts Luke and Abi embark on a playful yet earnest attempt to rank Harry Potter characters using a tier system. The session reveals Luke's struggles with character recollection, much to Abi's amusement and listeners' enjoyment. They address why some characters, like Lily Potter and Neville Longbottom's dad, deserve higher recognition, while others remain forgettable. With a sprinkle of humor and a dash of debate, Abi provides clarity while Luke offers his unique viewpoints. Their chemistry endears listeners, turning what could have been a mundane listing into a lively and engaging discussion.