In an interview with Joshua Jackson, he describes his characters's father, Walter Bishop, as the Wizard of Oz and describes their relationship. Joshua goes on to say what we can expect when the show returns on April 7.
Elizabeth: Sometimes what we have is not the world we want, but we have our hearts and our imaginations to make the best of it. I will promise you this: I will be the best mother I possibly can be to you. I'll take care of you, I will protect you and I will never let anyone take you away from me. No one. Not ever. Peter: But you're not her, are you? You're not my real mother. Elizabeth: You were sick. You were very sick for a long, long time and I think it confused you. Yes, I am your mother, of course I am.