Back in the sunken halls, low on torches and with no wood, they leave one witch alive for now and move on. The pizza from last time is still around, and it smells really good.
Jumping down
A chest has a gold anti-projectile chestplate, but one of them already has a better one on. Another corridor leads to a room full of little platforms over the water, lit by redstone torches. Each platform has something on it. There are skeletons below, creepers on one, a witch spawner somewhere in the middle and a skeleton spawner on the far one. The platforms are set up so you could try to jump across them.
One of them says they're not going to jump down. Then he jumps down. The other misses his jump, as predicted, and lands on an edge under a creeper spawner while getting shot, slowed and poisoned. They pick the spawners off one at a time, including a punch-bow shot, until the room thins out.
It's a trap
The spawner is down, which is the important thing. Then the ground blows up. It's a trap, triggered from below, and nobody is quite sure what set it off. Whoever was standing closest had already moved because of the witches.
There's a lot of experience to collect and gear to repair afterward, and a hole in the floor turns out to have an emerald in it. Get the emerald, good job. The finder decides he'll hold onto it rather than run it upstairs.
Sharpness axes and a pit
Spiders keep coming from above, which suggests the next level up is spiders. Some of them are poisonous. The zombies are dropping Sharpness 2 axes, which is pretty cool, and there's a Protection I book. One opening they follow is just a pit down to a level they've already seen. If they had looked up from down there, one of them points out, they'd have spotted it as another way in.
Then Scoti is dead, by his own account. "I bought you pizza," he protests on the way out. He respawns way back at the beginning, because they never put a bed down, and runs the whole level again, nearly drowning on the way. They still have to go get that emerald. While Basket works on recovering his stuff, creepers keep heading his way, and he's down to three hearts at one point. Scoti makes it back to the middle, and someone has lost their pants. Here, have these pants.
Restock
Upstairs there's a chest, ladders and a bed, and one of them sets his spawn. Neither of them has Infinity, so arrows get split down the middle. The witches get killed, but not before their potions leave one of them slow and poisoned. They sort through the loot: a Punch 2 bow, potions, and new leather to replace a chewed-up chestplate. The bed stays, because they slept in it and there's a spare.
The next room has more platforms. They call it an episode.