forces Walternate to admit that Fauxlivia was switched with Olivia, and that the child Fauxlivia carries is his grandchild. Meanwhile, Marilyn learns that Fauxlivia's test for the virus is positive and warns Charlie that Fauxlivia will die if she has the child. During the Fringe team's search, Fauxlivia finds herself being put under a treatment to accelerate her pregnancy, bringing her child near term. She is able to escape from her captors and contact Fringe division to identify her location, but struggles from labor pains as the child is about to be born. Henry drives Lincoln to her location, and they are able to help Fauxlivia to deliver her child, a son, before medical help arrives. Fauxlivia and her child recover under tight security ordered by Walternate, fearing for their safety. The doctors determine the accelerated pregnancy outpaced the virus, thus allowing both Fauxlivia and her child to survive. In the epilogue, as September, (Michael Cerveris) an Observer, watches, a blood sample from the child is drawn discreetly by one of Fauxlivia's captors posing as an orderly, who transfers it to Brandon (Ryan McDonald), who is revealed to have developed the accelerated pregnancy procedure under Walternate's orders. Meanwhile, Lincoln and Charlie become somewhat distrustful of Walternate after learning what he hid from them. They consider that Colonel Broyles (Lance Reddick) disappeared around the same time that Fauxlivia returned, and wonder what else Walternate is hiding from them. Production "Bloodline" was co-written by co-executive producers Monica Owusu-Breen and Alison Schapker, while The Practice veteran, Dennis Smith, directed the installment. Editor Timothy A. Good has called "Bloodline" the second of two parts – the first half was the season's third episode "The Plateau", which Owusu-Breen and Schapker also co-wrote. Executive producers Jeff Pinkner and J.H. Wyman had planned Fauxlivia's pregnancy since they conceived her character, but noted that "this isn’t going to be a normal pregnancy that you see, either. And the pregnancy is [going to evolve] in a Fringe way that you don’t comprehend yet. It's not going to be your traditional love triangle, 'I'm pregnant and having a baby' story. It’s going to be Fringe-ified." In late January 2011, TVline's Michael Ausiello reported actor Andre Royo was returning for one episode later in the third season. Royo made his third guest appearance of the season in "Bloodline", as cab driver Henry Higgins from the parallel universe. It is his final