This Christmas we're in for a real treat. On Boxing Day night the BBC are showing a brand new spin-off episode of Roy Clarke's classic convenience shop comedy Open All Hours to celebrate its 40th anniversary.Several cast members including Sir David Jason and Lynda Baron as Nurse Gladys Emmanuel are reprising their roles from the original series for this Christmas special. The filming of this has also led to strong speculation Still Open All Hours will be given a full sequel series next year. As delightful as that future prospect sounds, it got us wondering at WhatCulture about what made the original show so great and laugh out loud funny? Many younger viewers may not be aware of Ronnie Barker's comic genius, but he starred both in Open All Hours as the money-grabbing Albert Arkwright and loveable lag Norman Stanley Fletcher in prison sitcom Porridge. And all that whilst performing sketches with Ronnie Corbett. In homage to the brilliant Barker, his awesome apprentice Jason and the clever writing of Clarke, we have gone back and watched every Open All Hours episode in search of ten compelling reasons why you should do the same. So, if you're ready Granville, f-f-fetch your cloth and click next below to start our countdown!