Walter (John Noble) tells Olivia (Anna Torv), and the audience, the back story relating to Peter (Joshua Jackson) and takes the story back to 1985 (which also allows for an 80s-style title sequence). Written by Jeff Pinkner, J.H. Wyman, and Josh Singer from a story by Pinkner, Wyman, Singer, and Akiva Goldsman. It debuted on…