The last couple of episodes of Yakushiji Ryoko No Kaiki Jikenbo actually managed to up the quality of this series quite noticeably, and with this episode introducing French maids who are also experts in weaponry and computer hacking surely things can only get better?
Well.... Not really. After a handful of earthquake-like incidents, and other oddities going on underground, Ryoko soon gets to the root cause of the problem, which is. A giant salamander. Don't you just hate it when huge lizards ruin your underground network? This also ties in to the discovery of a large underground paradise for beauraucrats, crafted using the fruits of their ill-gotten gains by siphoning away tax money to build their own little secret theme park, which certainly beats a cash for peerages scandal any day of the week.
The problem is, this whole episode feels rather rushed and disjointed, and even if you manage to forget about the absurdity of a giant salamander living in the underground network for no particular reason, and the numerous other plot holes I could probably start picking if I used some of my brain power to actually start thinking about the plot, you're still left with a messy and distinctly unsatisfying instalment. While the past two episodes had enough mystery or tension to at least keep my interest for a while, there was nothing to really make me want to keep watching this episode beyond giving me the ability to write these very words.
Quite simply, it was an easily forgettable episode, and there isn't a great deal more I can say about it beyond that.