Battle of the Duds! Tom Gleeson invites failed former contestants to humiliate themselves all over again. Vying for the dud mug are experts in social media platform TikTok, soccer's A-League, comedy film Mean Girls and teeth.

It's another classic Hard Quiz line-up as experts on flags, Bruce Springsteen, stage musical Hamilton and Japanese artist Hokusai fight it out. Only one will prove worthy of Tom Gleeson's Big Brass Mug.