Duplicate episodes issue

Hey!

So I've recently begun the tireless task of adding every episode of "The Archers" - nearly 20,000 of them, with credits (I'm a glutton for punishment) - as well as keeping up to date with the episodes as they go out...

Only every so often, someone keeps adding duplicates of existing episodes, always with the date as the title (incorrect). They must be adding them blindly, working from a list or something maybe? They definitely haven't looked in a good while! I don't want to 'take ownership' of the page but it's quite annoying. Is there a way to politely tell a user to, you know...stop?

Thanks!