Main Article: Escape!
When your father escapes the vault, he questions and tortures, fellow vault member, Jonas. When escaping, you see him questioning Amata, asking where you are. You can, walk past and ignore them, raid in on the party and kill the overseer, getting his Terminal Password, or go in and threaten to kill Amata, and get the password. If you keep him alive, you can later talk to him in the quest Trouble on the Homefront.