Most of the recent Big Finish ones were only one main character and one or two others, but as this will be full cast I hope it will feel like a real audio play. Especially if they recorded together.

There is another one out earlier, with just Jack and Ianto. That one was recorded with Gareth in the UK and John in Palm Springs. It's great what technology can do these days but I think being together may infect their acting big time!