Fringe spoiler alert: We've already seen this Friday's "Back to Where You've Never Been" and can confirm that it focuses on Peter's visit with Walternate and all he learns about that alternate timeline.

But what can viewers expect going forward, on what might be Fringe's final season?

In a wide-ranging interview with EW, Jeff Pinkner and Joel Wyman teased the following developments/storylines:

• The discovery of who is behind the Shapeshifters.
• The continued use of Lincoln as a "valuable" member of the team.
• More surprises from Nina in her role as a "surrogate mother figure" (Wyman's description).
• No plans, in the immediate future, to return to the old timeline.