You can't listen to any but the latest show on the iplayer. I'm on a torrent site where you can get them all, if anyone wants an invite you can send me a private message.
Please could anyone direct me to where I can get hold of old JC Sunday Services?
I've found the first 4 on a torrent site, and managed to download 2 or 3 recent ones using an iPlayer downloader, but now that doesn't work anymore. :-/