On the CBS message boards someone posted an article from the New York Post which mentions some possible future storylines and/or guest shots, which I'll put in spoiler tags since one is related to the 10/13 episode.
In no order:
--- Gibbs' boat makes an appearance....as a crucial piece of evidence in a murder investigation.
--- We may actually see another part of Gibbs' home besides the basement.
--- McGee gets a romantic relationship. Abby will not be pleased.
--- Another Halloween episode finds the team investigating the death of a joke-playing Marine.
--- The LA team discovers a woman with a link to Director Vance's past. She'll be making an appearance in both shows.
--- A blackout hits the city, forcing the team to work without pretty much everything in Abby's lab.
--- the article alludes to Ziva being the new Probie. "Good Cop, Bad Cop" will answer that question.
--- Mike Franks returns. Hopefully we get an appearance by Fornell this season.
--- Gibbs' boat makes an appearance....as a crucial piece of evidence in a murder investigation.
--- We may actually see another part of Gibbs' home besides the basement.
--- McGee gets a romantic relationship. Abby will not be pleased.
--- Another Halloween episode finds the team investigating the death of a joke-playing Marine.
--- The LA team discovers a woman with a link to Director Vance's past. She'll be making an appearance in both shows.
--- A blackout hits the city, forcing the team to work without pretty much everything in Abby's lab.
--- the article alludes to Ziva being the new Probie. "Good Cop, Bad Cop" will answer that question.
--- Mike Franks returns. Hopefully we get an appearance by Fornell this season.