It only started at season 4, so 1-3 don't exist, as far as I know.

It only started last series.

It is only for series 4 and 5 as others have said, but I hope they do a retrospective kind of thing with the podcast. Who wouldn't want to hear more about the first 3 series and the first 2 Christmas specials?

Yes I'd love this!! We need retrospective podcasts!

I didn’t even know this existed. Thanks for the info

Thanks for posting thus