Nothing As It Seems
Marshall Bowman, a plane passenger, transforms into a strange beast, due to a "designer virus" with which he has been injected. Peter recognizes this as a case from his original timeline, but in this timeline, Bowman doesn't fully transform on the plane, allowing it to land safely. However, while under investigation by the TSA, Bowman transformed and attacked the agents before dying.Meanwhile, Olivia, having accepted the replacement of her memories with those from Peter's original timeline, is deemed unfit for field work and Lincoln Lee is put in charge of the Fringe team. Peter uses his recollection of the Bowman case to lead the team to Daniel Hicks, who was to receive the designer virus before he too transformed. Hicks, now transformed, escapes. The team finds out that the Hicks creature is nocturnal and can fly. Lincoln leads the team to stop the creature, along with a woman who was caring for it. The creature is killed, while the woman is unable to supply answers about the origins of the designer virus.
Phillip Broyles tells Olivia that while she may be losing part of her memories, she is still an asset and is allowed back to active duty. The episode ends on a reveal of a container ship that contains a number of other transformed humans and other creatures at sea.
