This one & the next I was avoiding things for the best I could, especially the next one. Still am for it so very glad it'll air here so I don't have too much longer to not know & avoid things
I'd be interested to know if they were implying he was some kind of psychic. Wouldn't be the first time as Abby's said she has a theory that he has magic I think back in season 6 when Fornell/the FBI were investigating them all. But I think Franks is just a memory haunting Gibbs. It was a nice touch in the episode, but such a let down. He could've been haunting Gibbs throughout the case. On the other hand the small appearance at the end also seemed to fit perfectly