While the season four premiere has gone through two titles (first, "A Sort of Homecoming," then "Neither Here Nor There"), it looks like the second episode of the show's fourth season is a lock for just one title: "One Night in October." While the title doesn't give us much, the show's press release is an absolute zinger:
"As the victims of a highly intelligent serial killer 'Over There' stack up, the Fringe Division 'Over Here' is asked to assist. As the two sides tangle and innocent people remain at risk, the suspect's doppelganger 'Over Here,' a professor who teaches Forensic Psychology, is brought into the fold and forces the team to consider the notion of sending civilians to the other side."
It really sounds like the writers are really living up to the potential opened up in the season three finale. Interestingly (or is it?), there's no mention of Peter here, though he's still listed amongst the main cast in the episode's press release. You can bet the show will slyly be referencing his (non)existence throughout, though.
"One Day in October" will air on FOX, ironically, Friday, September 30 (just one day short of October).