So, since Skyrim is , I've decided to come back to Morrowind and look at some good ol' lore.

The Dwemers really interested me in Morrowind, are non present in Oblivion, and quite interesting in Skyrim.

So could someone just tell me how to do that questline where you meet the Dwemer ghost, who was trapped in a different dimension when they all disappeared? Thanks, I really liked that bit.

Lol @ Skyrim is boring.

Anyway, he is in the "Tribunal" expansion and you will meet him during the Main Quest of that expansion.

"Go back to Morrowind and look at some good o'l lore"
Well, I don't believe you have actually played the game or looked at any lore surrounding the Dwemer, if you had of looked at it you would have known It was Yagrum
who was in a different dimension.

And no, he wasn't trapped either.

Radac Stungnthumz is just a Ghost.

In Morrowind's MQ, you meet (most of) Yagrum Bagarn.

In the Tribunal expansion, you meet the ghost of Radac Stungnthumz.

Neither really knows the details of what happened to the Dwemer, being either absent from Mundus or already dead at the time they vanished.

Baladas Demnevani in Gnisis can tell you more (in confusing "technical" terms), if you raise his disposition enough and ask the right question before asking a different one, if I recall.

Dahrk Mezalf is another ghost you'll come across through a quest, but as it has been mentioned Yagrum Bagarn (who is in no way a ghost) is the one in question to the OP.

Conveniently he was in an "Outer Realm" when the [censored] hit the fan. Right... A master crafter in service of Kagrenac and he doesn't know about their disappearance. A Corprus "prison" suits him just fine for me. If I'm feeling merciful I kill him.

Anyways, he can be found here. http://www.uesp.net/wiki/Morrowind:Yagrum_Bagarn

Skyrim is not boring at all.

Funny how good everyone here is at getting the point.

FACT: Skyrim may or may not be boring.

Anyway Yagrum Bagarn, Dahrk Mezalf and Radac are the only named Dwemer the player can encounter.

Baladas Demnevanni can provide some information on the dwemer and to a lesser extent Divayth as well.