1) Mandalore is a world behaving similar to the nation of Switzerland on Earth. It's neutral. It wants to stay out of the conflict going on between the Separatists (the droid armies and Count Dooku) and the galactic government.
2) Mandalorian armor is the stuff that Boba Fett wears. It's the really cool tight-fitting combat armor that you now see everywhere from G.I. Joe, to first-person shooters, to Iron-Man, to my own books, etc. Just think "athletic young guys wearing sexy battle armor" and you got the picture.
4) "The Mandalore Plot" is a mystery/thriller that unfolds intricately and weaves its way into other storylines that pass from episode to episode. I like that. We also get a recurring villain in the Governor of Concordia (moon of Mandalore).
Here's a summary for you on what happens in the episode:
Obi-Wan arrives on Mandalore and meets Duchess Satine (of course he thinks she's pretty groovy looking). Satine tells Obi-Wan of a rogue group of Mandalorians called Death Watch who may be responsible for terrorist attacks on a Republic cruiser. They are criminals hiding out on the moon Concordia.
Death Watch launches a terrorist attack on Mandalore and both Obi-Wan and Satine chase down a man responsible who tries to jump to his death rather than be interrogated. A few seconds before he bites it, he whispers some last words to the Duchess in the dialect of Concordia.
Below is the short video clip wherein you see the explosion done by the terrorist group, Death Watch, and a conversation between Obi-Wan and Duchess Satine. Again, the animation is amazing.
|Obi-Wan protecting his babe, Satine, who's hiding up on the rocks behind|
him. He's facing off against the Governor wielding a darksaber pictured
|The Governor of Concordia. In his hands is the afore-mentioned darksaber.|
I've no idea how it's different than a lightsaber. Maybe Andrew will stop
by and let us all know in a comment. I do kind of dig the Gov's mohawk.