NCIS writer Jesse Stern has been tweeting about "Swan Song", the penultimate Season 8 episode.
On April 19th Jesse Stern tweeted:
"Anxious to get the Director's cut of ep 23 "Swan Song" tonight. That first cut is usually painful. Then you dig in and make it better."
On April 20th he added this ominous tweet:
"I'm not quite sure what we've made here. I've never seen an episode like "Swan Song"...