I'm thinking Duane Henry is going to be Michael Weatherly's replacement. You sorta can tell he's getting involved with the team. Sort of an exchange agent sort of thing. Sarah Clarke will be guest starring as Joe Spano's (Fornell) temporary replacement as he's supposed "to be out" for a while. Not sure why he was written out - Spano didn't say he was leaving. What a lead in... guess we'll have to see if there's any midseason shuffling. Though I kinda liked having both NCIS's together... And let's not forget the second NCIS spinoff did fail... it had two crossover episodes and nothing more. Edit: it was the second NCIS spinoff. We're on the third (NCIS NOLA) right now.