The Siege of Mersadie Hive was a custom scenario lovingly crafted by Arthur. As such, unless your GM is planning to borrow the scenario by hacking together what they hear on this episode and the notes on Arthur's blog, there's really no spoilers to worry about.
As always, be aware that the podcast is not really family-friendly, and features some background noise, if that sort of thing bothers you.
I'm afraid this isn't the most thrilling episode, as we're basically just setting things up, although we did have some quality time with our boys. I very much enjoy playing Big Gang Brother and otherwise quietly taking the mick.