Today I managed to watch the episode on the big high-res TV downstairs - so got a better look at it. I liked how they had the bones on the floor with a torn knapsack and another Helmet of Justice - the remains of a previous dungeoneer, indeed, complete with his ghost (skull)

In the room which used to be Ariadne's Lair, the top of the screen was blacked out again (i.e. you couldn't see the green valley beyond). Used the key to free Velda, who gave them a step clue.
Next, into the corridor of catacombs. Couldn't escape the moving wall, so used the GHOST spell to turn Martin into a ghost! (a skeleton thing with a helmet of justice). He walked through the wall, then said 'BOO!' in his ghostly form to scare off the armored warrior guarding the well! Then disspelled to turn him back - and he went down the well.
Notice how he left the bottle on the side of the well - apparently there was no use for that object, and you can't use Level 1 objects in Level 2.
There was a pineapple on the Spindizzy, oddly enough! They made Martin bend down to pick it up even though he was facing away from it - and he only noticed it when he was told to do a 180 degree turn!
This time there were no symbols above the doors as to which one to take, so they went for the middle one. Notice how they asked Martin if he could see the edge of the disc - something other teams haven't done!
It looks like Martin actually stepped into the gap between the two doors, but were let off again!
Next room contained the Catacombite, and also a green skull that chased him all the way to the door!
Then got food in the former Level 2 clue room, and listened to an Oracle's message. Seemed to be giving ingredients and directions for a food recipe at the start, but also gave them the 3rd 'step' clue and warned them about "Dreadmog who causes all disruption".
In Merlin's chamber, they thought they could see a crystal in front, but there was no tree or lion... then they figured out that calling the names would invoke the steps! Merlin appeared before the lightning again! And I think he appeared slightly transparent here

Got 2/2 on Merlin's riddles and gained a CURE spell, a universal healing. It can be used either on yourself or on someone else, but can only be used once.
Into a long corridor (Corridor of Catacombs with different lighting), with an armored knight in the distance. Got him out of there quickly

Next, into the tiled 5-door room, with Mellisandre and Motley (who had lost his voice). They already knew Motley's a good guy, since they met him in the kitchen, so they used the CURE spell to get Motley's voice back. As a reward, Motley decided that Martin could call him in his moment of need for assistance.
No clue as to which door to take, so they took the extreme right door.
Then the Corridor of Spears - with food on a table in the middle of the spears! For some reason, the spear clashing sound effect didn't play the first time they clashed together

After that, into the 3-cave system. Instead of the giant toad, there were mountains in the distance and bats flying around the cave. They obviously knew where the exit was, perhaps they had watched a few previous quests?
Next area, they picked up a piece of the chalice (part of their quest), and a horn appeared whenever the goblin horns sounded! Oddly enough, Martin jumped down behind the ledge after getting the quest piece, even though it looks like it's part of the wall! Timed out in the next section as the goblins were chasing.
View of the Corridor of Spears (no table) over the credits.