Sarah, Felix, and Kira arrive at a house belonging to Cal Morrison, who is revealed to be one of Sarah’s marks and Kira’s father. He allows the three to stay for a little while in Orphan Black S02E03.
Orphan Black S01E03, Alison tells Sarah that they are clones. In the briefcase, Sarah and Felix find that three of the clones Katja had found were already dead.