-- Morality separates heroes from villains.
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[Well, actually, considering that we're into season five, now, probably no one new is going to sign up, BUT! Hop over to The Armchair Squid for his take on the current episode.]
Satine is in danger so, of course, Obi-Wan goes to rescue her. Alone. With no backup. Because the Jedi can't get involved because Mandalore is a neutral planet. And, of course, it's a trap, but Obi-Wan actually doesn't know that this time and is caught completely off guard. Probably why Jedi are supposed to control their emotions, I suppose.
In the scheme of things, this is a pivotal episode and one that really shouldn't be missed. At least, it shouldn't be missed if you follow any of the non-movie canon material. Big things happens. Plot threads are tied off. There are deaths. Maybe I should say "more deaths," since we've already seen quite a few in this arc.
One thing I will say -- and it's sort of a spoiler, but it's not a spoiler that's important to the story -- Anakin's ship, the Twilight, gets blown up. I always liked the Twilight (yeah, a part of me rebels (heh) just writing that, but I am talking about Anakin's ship (just to be clear)). It was funky. And cool. And, now, it's gone. Oh, yeah, Darth Maul was responsible for that bit of destruction but, then, if Obi-Wan hadn't taken it without permission... You know, I can't remember if they ever deal with the fact that Obi-Wan got Anakin's ship blown up.
Anyway... Must see episode and all of that, so just go do it.
"It takes strength to resist the Dark Side; only the weak embrace it." -- Obi-Wan Kenobi