Other than Jar-Jar, I think Dex is the worst character in the saga. His CGI wasn't very well done. And he's got that demeanor that's supposed to be..."funny?"...to the kiddies, like how Jar-Jar was supposed to be. There's no explanation of his connections with Obi Wan or the Jedi, and there's no explanations of why out of all people Dexter is the one who knows the dart and where the dart came from (Kamino). I mean really, even if the archives in the Jedi Temple were wiped clean of Kamino by Dooky, there's got to be some other place that has records of it. Or at least a navcomputer. I think that whole scene, along with awful Jettster, was very poorly written and not very well thought out.