Fueled by his vision of Emma in grave danger, Peter attempts to rescue Sylar from his worst nightmare. At the carnival, Samuel reveals H.R.G.s secret past in order to bring Claire to his side. Meanwhile, Lauren makes a bold move to put a stop to Samuel.
When Barney is about to complete the perfect week – landing seven different girls in seven days – the gang roots him on in order to forget about their own miserable week.
Jack is set up, Renee makes a sacrifice, and Dana sends her ex into a police warehouse. Meanwhile, an arms trader deals with his sons, and the President buys time.
Zoe’s avatar tries to adapt to her new life inside a robot’s body while the Graystones and the Adamas cope with their losses. Elsewhere, Lacy dines with Sister Clarice, and young Will Adama spends some quality time with his shady uncle.
In the year 2020, Echo and her surviving Dollhouse crew attempt to restore order to a devastating future world before mankind is eliminated.
When a specific group of guests at a wedding in Brookline, MA, suffocate from the inside out, the upsetting and disconcerting crime scene has the Fringe team investigating how the toxin was delivered and targeted. As evidence is taken into the lab, it’s discovered that the wedding ceremony was a testing ground for a weaponized science experiment. Adding to the intense lab investigation, Walter uncovers an alarming formula that reveals a link to a branch on the Bishop family tree. With the escalating threat of more deadly attacks and unexpected familial ties to the case, the Fringe team stops at nothing to prevent further catastrophic events.
When Peter and Neal discover that an estate judge committing mortgage fraud is also connected to Fowler, they devise a plan to bring them both down.
Mysteries abound when a family returns from vacation to discover a dead man in their daughter’s bed. Thinking they’re investigating the murder of a squatter, Castle and Beckett soon find themselves unraveling a multi-million dollar heist. Meanwhile, Castle tries to keep Beckett from finding out that they’ve been romantically linked when he’s featured as one of New York’s 10 most eligible bachelors.
H.R.G. enacts his plan to take down the Carnival with the help of Lauren and Suresh. Sylar visits Matt looking to understand his desire to make a human connection, but Matt has a plan of his own. Meanwhile, Peter warns Emma of Samuel’s intentions after his grim vision of the future.
The Russians mistrust Renee, U.S.-Kamistan negotiations hit a snag, and the past of CTU analyst Dana Walsh becomes her nightmare.