A card reads "Episode 04, GopherCraft UHC 10." "I'm alive. Hooray!" Basket and pulse2010, the purple Cave Prospectors, are still deep underground. The cave full of trouble from last time is blocked off, so they try another way.
Lava traps and gold
The new cave goes up and down in a bunch of directions, with a spider in it and creepers both in front and behind. Lava is the main tool. Going back for a creeper, they find a lava trap, and an enderman stuck nearby. "Yeah, he is trapped, I'm just gonna make sure he's trapped all the way." Later the line is "I'm killing the Enderman with lava," and after a short wait, "Alright, he's dead."
Gold keeps turning up the whole time, first 11, then 19. "We might actually survive this."
The plan for the caves is to light everything. "Keep everything as lit as possible. That way when we walk away and then come back they don't respawn." Lapis gets picked up in case they ever get to enchanting. "The elusive diamonds haven't shown up yet."
A dungeon in the water
Three zombies and a skeleton come at them next. "Alright, he can't path up to me." Lava goes down on the group, and then gets scooped back up. pulse2010 wades through a flooded stretch with zombies right behind.
Past the water is a mossy cobblestone room with a spawner and a chest. Inside the chest are a bucket, a music disc, string and gunpowder, and two saddles turn up too. There's a lot of bedrock around, which probably means they're near the bedrock box in the middle of the map.
Tea at the cottage
Chat has been busy. TopStiGear, now alone on cyan, asks "want to team steel?" Steel_Douglas, alone on red since optimus1971 drowned, answers "oh im rolling in gear and such." TopStiGear has "a nice cottage with tea brewing" and later says "Currently have seating for 4 at the cottage if anyone does want any tea and fresh bread." OjiiOtousan asks what happened to TopStiGear, who turns out to be down to one and a half hearts. "oh I forgot about drowning."
Then the red lines come back: "Soul Crusher is coming!" and "The World Border is shrinking 300 blocks over 5 minutes." Afterward, "ty750 left the game."
The smelting room
The dungeon becomes a workshop. A wall of furnaces stands beside the torch-covered spawner, and the gold and iron go in, just in case diamonds turn up. "So really if we just hang out here the rest of the game and don't move, everybody else might be crushed."
The spare iron pick goes in the chest to repair other picks with. Even with diamonds, enchanting would need books, and books need sugarcane, which nobody has. The idea is to hit the surface the next day.
Still no diamonds
More caves, more dead ends. Gold comes in eights and fourteens. Lava hangs over one passage, and a creeper waits at the end of another.
"Am I dead?" "Uh-oh, nope." They reach the other side of the bedrock box. "I was really hoping for diamonds but I guess they don't exist on this map."
Pillaring up starts to sound better than searching. "Because it'll be safer than it usually is." One last dark cave turns up, and it might go somewhere. The server posts "End of Day 4. Players remaining:" with erynfaith, OjiiOtousan, pulse2010, BasketMC, Steel_Douglas and TopStiGear. Basket is alive underground with pulse2010, and the end credits follow.