Episode 67! Just when you think the dungeon is out of surprises, a Tank jumps at you out of nowhere and runs down Yosuke.
It's back into the Marukyu Striptease to finish off the last couple of floors. Not willing to be finished without messing Charlie up in a memorable way, it promptly deploys freaking tanks. Vinny probably took a year or two off of Jeff's life switching to Kaiwan in the middle of that second fight. Still, they made it to the final floor and the save point. You should make some free time to watch tomorrow's episode. 1 Hour and 20 Minutes of Endurance Run, and you won't want to miss this boss fight.
Edit: It turns out I was grossly misremembering the length of that episode. It just felt like two hours.