A series of strange disappearances in Pennsylvania attracts the attention of the Fringe team and leads them underground.
Walter also tries to recreate Olivia’s accident using frogs and Charlie tries to find out how much she remembers.
Jay is having trouble keeping up with his new young Colombian wife and her son. Claire is having trouble with her husband Phil, who thinks he can be hip with their kids. Mitchell and his partner Cameron adopt a Vietnamese baby.
Alicia returns to work as a defense attorney after her husband’s corruption scandal and incarceration. She is assigned her first case – a retrial of a woman accused of murdering her ex-husband. Her firm successfully deadlocked the first jury, and they hope that sticking to that strategy will work again, but Alicia realizes that this trial will be more of a fight than anyone expected.
The team discovers that MacPherson is auctioning artifacts he has siphoned from the Warehouse shelves.
Castle has a lot going on. He’s trying to finish his new novel Heat Wave and trying to figure out how to fix things with Beckett. But circumstances force the pair back together to investigate the mysterious murder of a man found dead, tangled in the limbs of a tree.
After sharing a kiss at the beginning of the summer, Robin and Barney are unsure how to handle their mutual attraction. After some consideration they tell the gang they have decided to remain just friends, but secretly continue seeing each other. They are able to get away with their secret romance for a couple months, but are discovered when Ted, Marshall and Lily walk in on them together. They explain to the gang that they are happy with their casual relationship, and didn’t want to complicate it by defining it. This is unacceptable to Lily, who pressures them to label their situation, and ultimately locks them in Robin’s room to force them to address it. Meanwhile, Ted is anxious about his first days as a professor at Columbia, which is made worse when he shows up at the wrong class and starts his lecture.
Six weeks after Matt and the others wiped Sylar’s mind, the Heroes attempt to go on living normal lives. We are introduced to « family » of carnies with abilities. Angela Petrelli and H.R.G. are in the works of restoring The Company while Claire makes new « friends » at school. Tracy is still hunting everyone from Building 26. Meanwhile, Hiro and Ando start a « Heroes for Hire » business.
Claire and her new friend Gretchen investigate the death of Claire’s roommate Annie, while Noah comes to Peter for assistance. Samuel and Edgar recover the compass, Hiro realizes his new destiny, and Matt is tormented with mental images from a dangerous foe.
Zoe prepares to leave for college. Tess receives a job offer in Australia. A magnetic disturbance hovers above Eureka.
Fast-talking lawyer Jeff Winger enrolls at Greendale Community College after the State Bar discovered his illegitimate degree and threatened to suspend his license, and forms a study group of unlikely friends.