Harry loses his cool with 3 swimmers that he's forced to rescue just seconds after warning them not to swim in a dangerous area. However, calling them "imbeciles" and "idiots" puts him in hot water.
Just seconds before a building is demolished, a mysterious mute child that has been living alone underground is discovered. When the FBI's Fringe Division investigates, the boy forms an unspoken connection with Agent Olivia Dunham. Meanwhile, an especially gruesome serial killer resurfaces and showcases his "artistry" by displaying his work publicly. As the boy gradually assimilates into a new environment, Olivia and the team must race against the clock to prevent the mad man from causing further massacre.
Patrick Jane and the team go to Hollywood when they investigate the murder of a movie producer.
Julien can't take Mort's obsessive feet touching, so he exiles Mort from the lemur habitat.
Tommy copes with the loss of his father and a new man in Janet's life. Sheila finds a different way to deal with her issues while Sean, Franco, and Mike concoct a surefire way to get rich and laid.
The suspect list keeps growing as the team investigates the disappearance of a Russian matchmaker.
The Devil misleads Sam into thinking his next escaped soul is an easy catch and encourages him to take along the gang for a road trip. Unfortunately, when they arrive, they discover a tentacled beast has taken over a small town and is eyeing each of them as its next dinner. Meanwhile, Andi feels Sam is becoming too comfortable with this lifestyle, Ben struggles to not be so clingy with Nina, and Sock makes one last effort to sleep with his stepsister.
Jamie beats Joe up after he discovers that he has been hitting Mandy. Mimi decides to take the blame for the attack to save her son from being sent back to prison. Paddy's secret comes out.
Jill gets set to play her doubles tennis match against Ramona and Mario, but it could be a histrionic racket when her pro tennis partner opts out and Jill invites Simon to play with her. It's game, set, drama when the other wives attend the match. Meanwhile, Jill shows her home redesign to Bethenny; and Bethenny seeks help with her product-logo design.
A turf war ensues when Stabler and Tutuola link an artist's murder to a serial killer, and the detective assigned to that case focuses more on their involvement in an investigation he believes belongs solely to him than on identifying the killer.
When a government scientist goes missing, Abby is recruited to carry on his work, but the team worries that she may meet the same fate as her predecessor.
With scant evidence James Steel and Alesha Phillips find themselves up against a tenacious barrister defending an eminent doctor accused of sexually assaulting a patient.
A windstorm changes the name of The Ruby; Wanda requires equal rights at work, leaving Brent with more problems than he'd expected; the results of a jam contest leave Oscar concerned about Emma.
Timmy has lost the last piece to his jigsaw puzzle. But wandering the nursery to find it, he discovers other lost toy pieces. Returning these to their rightful boxes but failing to find his jigsaw piece, he sadly begins to pack up the unfinished jigsaw... until his friends find a certain lost item for him!
Doug and Maggie's romance has flourished so much that they set their wedding date, but the date may be put on hold when Maggie is attacked by an unknown predator. Meanwhile, Johnny and Rhetta try passionately to save Leon from his upcoming execution by starting a petition. And young Clay continues bonding with Leon's son.
As Danko spearheads the government operation, someone close to him is put in the line of fire. HRG’s life continues to spiral out of control and his marriage is dangerously close to the breaking point. Meanwhile, Hiro and Ando continue their road trip with a special delivery for Matt Parkman. Elsewhere, Angela Petrelli unearths the demons of her past.
Even though Aaron's gut instincts about one of Hall's scientists being shady is dismissed by Hall, Aaron is validated when the scientist offers him a chance to steal from Hall.
As the day stretches into the middle of the night, Jack and the FBI formulate a plan to prevent further terror attacks. Events take an unexpected turn when the politics surrounding the administration expand beyond the White House.
Castle and Beckett investigate the murder of a women found frozen and tangled in steel bars at a construction site. The case leads them to look into an old case and also has Beckett thinking about some memories of her past.
Charlotte, an older woman who has spent the last six months taking care of her dying husband Eddie, is rushed to Princeton Plainsboro after collapsing from respiratory failure. The couple becomes a double mystery for the team when Eddie begins to improve as Charlotte’s condition worsens. The previously unthinkable becomes real when it seems that Charlotte will die before Eddie, and the team will be forced to make a difficult decision.