When Elizabeth and Bob Tsironis' twin boys, Teddy and Nicholas, were born, they only weighed a pound each. They beat the odds to become healthy, strong, three-year-olds, but their parents are so grateful that their miracle twins survived, they completely spoil the rambunctious toddlers. Nicholas even has a broken leg from Teddy pushing him off the bed! Meantime, big sister Kate, four, is sometimes overshadowed by her brothers' pandemonium. She copes by compulsively lying about painful foot cramps to get attention -- everything stops in the household when she is "stricken." She also manages to have the twins get blamed for her own misbehavior, but her parents have no idea they are being duped.

Holly and Jimmy Tafoya can’t quite figure out why cursing, spanking and washing their kids’ mouths out with soap aren’t working as discipline tactics. And when Supernanny steps in, Holly shows her the door!

Dad, Sindo, is a civilian contractor in Iraq, leaving his wife, Michelle, home alone for five months at a time with three rambunctious children -- Sindo, 9, Ashley, 7, and Mikey, 6. Mom is easily overwhelmed and rides a daily rollercoaster of emotions, waiting for Dad's regular email to reassure her that he has survived another day. Her frequent crying, yelling and overreaction to the kids prompts the children to respond in kind with hostility and behavior that quickly spirals out of control. Ashley throws giant temper tantrums in public, so Mom is reluctant to take the children out. She feels enormous pressure to fill the role of both mother and father, and though Dad calls as often as he can, phone warnings hold little threat when he's half a world away.

Shannon and John both have high profile jobs at a large church, but their home is a far cry from a peaceful sanctuary. All four of their children fight with each other so viciously and so frequently that mom usually intervenes only if someone has drawn blood. That happens regularly because the kids bite, pinch, kick and pull hair for all they're worth. Mom's yelling isn't working, and Dad says he spanks to discipline, since he doesn't believe that timeouts or talking work. But in spite of the hardline tactics, neither parent has much authority.

Chiropractor David often acts like a big kid, laughing at the kids' antics even when they cross the line, and leaving Gina, a personal trainer, to referee on her own. She admits, "We are at a total loss." 14-year-old Casey, who is a wrestler at school, is very physically and verbally aggressive at home with his siblings and parents. He punches, shoves and hits, and has a bullying style, whether dealing with his big sister, Cally, 16, or younger sibs Corey, 10 or Carli, 9. All of the children swear like sailors and refuse to do chores, stubbornly saying that they're not paid enough per chore! Gina admits that she doesn't enjoy being around her kids, and husband David erupts in nervous laughter whenever the children defy him. His physical horseplay with Casey results in Dad getting injured, but he laughs it off, to Jo's amazement.

John and Sarah Manley have been separated for over six months. John has his own apartment but has tried not to disrupt his children's lives, so he has daily meals and spends every weekend in the family home, but overnights in his own apartment. The children, Max, 7, and Claire, 4, can't quite figure out what's going on, but they handle their worry and confusion by acting out with anger, backtalk, fighting and tantrums. A simple trip to the grocery store is so fraught with the kids' antics that Sarah cannot keep track of their whereabouts, and shoppers won't even go down the same aisle as the Manleys. Sarah finds it hard to hold her ground in the power struggle with her kids, partly because she's nearly as confused as they are about the state of her marriage.

Jo travels all the way to the UK on a rescue mission to help a single mom who has lost control of her children... and her own temper. Tara Howat is at her wits' end, overwhelmed by the daunting task of raising three children by herself. When she is at the breaking point, Mom's mood can be explosive. Tara's youngest son, Rhys, is a handful -- kicking his mother and swearing like a sailor. Even middle-child Shannon joins in to gang up on mom.

Before he died, dad Dwight Lewis called on Supernanny to ask if she could help his wife Antoinette cope with parenting alone while she grieved his loss. Can Jo help widowed Antoinette Lewis find a routine – and peace of mind?

Phil Davis smacks his children and curses at them. He expects Debbra, a working mom, to handle all childcare responsibilities for their family, as well as cleaning the house, but she can never meet his standards and he offers no help. He ridicules stepdaughter Morgan, 15, for dressing provocatively when she dresses modestly. Chaotic mornings filled with yelling and lots of childcare duties have resulted in Morgan, an excellent student, being late for school almost every day this term. Jo tells Phil that his behavior is going to break his children's spirits.

Greg and Fanci Sachs work long hours to provide Ryan, 5, and Jonathon, 3, an Upper West side childhood, but their guilt over time away from the boys weakens their resolve in the face of Ryan's tantrums. The youngster will have a complete meltdown in public when he doesn't get his way and it's making a big impression on Jonathon. The apartment is stuffed to bursting with kid gear and toys, since Mom buys toys three times a week at the boys' request, and the family owns 7 strollers, 4 of which are strewn around the cluttered home. Ryan's got separation issues with Fanci -- whenever she leaves the house, he clings and cries, and she unwittingly plays into it by prolonging her departures with lots of discussion and reassurance. Bedtime is a nightmare, and usually ends with both parents lying down with the boys till they eventually fall asleep. Later the boys join their parents in bed anyway, leaving everyone exhausted the next day.

Adele Del Re of Staten Island, New York, grew up fantasizing about motherhood. She had visions of herself as a serene caretaker and contented, quiet children, but the reality couldn't be more different. The Del Re household is the wildest one of the block. Mom and Dad both yell at ear-splitting levels to control their misbehaving kids. The four-year-old twins throw daily tantrums and engage in biting, slapping, throwing or hitting everyone in the house. Mom has a new fantasy for her household and she hopes Supernanny can help. In this version, it's not perfect, but there's much less yelling and fighting, and occasionally a babysitter and a night out.

It may be sunny in Tucson, Arizona, but there's stormy weather at the Goldberg house. Parents Adam and Shelby have their hands full with their three young children. Although the kids act tough, in other ways they refuse to grow up. Jacob, 6, still sucks his thumb and will not let go of his "blankie," while little sister Jayden, 3, clings to her binkie and throws temper tantrums at the mere suggestion she give it up. Jacob has violent outbursts and, together with his twin, Joshua, plots attacks against their sister and mother. Neither parent knows how to control the kids or give them consequences for their actions, and Dad finds it hard to control his temper.

Jo returns to the UK to rescue the Porter family, who are being held ransom by their nine-year-old daughter. Princess Maddison is a terror, ruling with a heavy hand and throwing tantrums like a toddler to get her way. To make matters worse, seven-year-old Harry is quickly following in his sister's unruly footsteps. With both parents treading on eggshells, can Supernanny restore order -- or is this one battle of the wills that can't be won?

It's been called hell on earth, and parents Don and Diane admit they are living with "little devils." With kids who delight in demolishing the house and are prone to fierce rages, Don and Diane don't know how to control the physical and mental torture the kids impose on their own siblings and parents. Don has to psyche himself up to enter his house, while Diane is running out of energy trying to keep up. Her time is so tight due to the kids' misbehaving that cooking dinner or even answering the phone seem to be impossible tasks.

Shannon and John both have high profile jobs at a large church, but their home is a far cry from a peaceful sanctuary. All four of their children fight with each other so viciously and so frequently that mom usually intervenes only if someone has drawn blood. That happens regularly because the kids bite, pinch, kick and pull hair for all they're worth. Mom's yelling isn't working, and Dad says he spanks to discipline, since he doesn't believe that timeouts or talking work. But in spite of the hardline tactics, neither parent has much authority.

Bill and Tammy McGrath of Hamlin, New York, have three beautiful young children, and their middle son, Aiden, 5, was recently diagnosed with Type 1 diabetes. Managing his illness is very anxiety-provoking for Tammy, because she saw her father die of diabetes at just 46 years of age. She sees Aiden's diagnosis as her worst fears realized, and mealtime has become a battlefield. Aiden makes power plays, refusing to eat, which not only threatens his own health and frightens Tammy, but causes problems for both parents in adjusting Aiden's insulin levels. The other kids, Liam, 4, and Paige, 9, feel their parents' distraction and are frustrated by it -- Paige hides out in her bedroom and Liam acts out aggressively.

Christina and Joe Heredia both work full-time and have four children under five years of age: triplets who have just turned two -- Samantha, Taylor and Ryan -- and older brother Brandon who is four. Christina is a well-meaning perfectionist who always tried to please her dad. Now, as an adult, she frets that strangers will judge her mothering skills, but in fact she's her own harshest critic, brought to tears by what she feels is her inability to deal with the challenges of raising these little ones. The simplest tasks are three times harder with the triplets -- they cannot be trusted to obey Mom on a short walk through the neighborhood without straying; Brandon tries to get attention from his parents by acting out; and all of the children disrupt mealtime, barely eating.

Kate and Roy Johnson thought it would be great to create a family business that all of them could enjoy. They spent much of their life savings creating The Coffee Park, a unique coffee shop and play-place for families to come and enjoy coffee while letting their little ones have a great time. Unfortunately, the Johnson children -- Denver, 4, Logan, 3, and Jack, 18 months -- have made it nearly impossible for anyone there to have a good time. The kids run around like they own the place, hit the customers' children, and are constantly disrespectful to the staff. As a result, Mom is left with the kids to do paperwork and bookkeeping from home, which is antithetical to the whole reason they built their "family" business.

Jo tries to help a married couple in Illinois with five children, including an openly defiant teen and a 4-year-old with separation anxiety.

Parents Keith and Sonya are so overwhelmed with their three older boys, Jett, 5 Gage, 3 and Trey, 2, that they're missing baby Myles' cues about wet diapers, feedings, etc. Mom literally has to run through the house after the active older boys with Myles hanging off her arm, head bobbing dangerously. Keith is a flight attendant and travels frequently, and Mom doesn't have enough arms for all the work! Neither parent is consistent about discipline, and their go-to punishment is "saucing" the three older kids, putting a dab of hot sauce on their lips.

Jenny and Tony Swift in Sacramento, California, have five lively and unruly children, ranging in age from 11 years old down to a baby of 9 months. Jenny, a stay-at-home-mom, enlists several other authority figures to raise her kids, including a young nanny. The four boys play around the unfenced, unalarmed swimming pool, riding bikes near the edge and not even wearing helmets. They openly defy Kadie, jumping from bedroom dresser to bed. In addition, Jenny's mom, Gloria, pops in regularly to help out with the kids and is the only person who has instituted any kind of discipline that the kids respond to.

Traveling to a secluded island off Seattle, Jo meets Rikki and Jenye Young, who forego discipline in a misguided attempt to compensate for uprooting their three young sons so often. After four moves just this year due to Rikki's sales work, Nicco, 6, Makai, 4, and Crew, 21 months, are out of control -- and Rikki and Jenye are at their wits' end. The boys run wild in and out of the house, and sometimes their safety seems in jeopardy. Rikki can't sleep because little Crew consistently wants in his parents' bed. And when Dad occasionally tries to inject some discipline into the boys' lives, the result is explosive tantrums. To make matters worse, Mom's first instinct is to comfort her children, not to stand firm with her husband. With a fifth move looming, Rikki and Jenye increasingly worry about the long-term effects of the family frenzy on their sons' lives.

A little dictator named Dylan rules the roost in the Van Ackers' Oak View, California, home, and parents Jessica, 34, and Kevin, 35, need to be liberated from his relentless tantrums and disrepect. Now three years old, Dylan refuses to be potty-trained and, worse, he's become anemic from his unbending preference for sugary snacks over vegetables and other nutritious foods. Supernanny Jo Frost embarks on a family revolution to instill parental discipline for the benefit of all, including six-year-old Emma, who can't even have quiet homework time with Mom without the distractions of her little brother's constant crying and complaining.

A trip to Kissimmee, Florida, is no vacation for Supernanny Jo Frost as she finds the Fernandez family falling apart. Former high school sweethearts Jerald and Marla married young and now, years later, their relationship is in trouble. That's largely due to their inability to control their defiant 12-year-old daughter, Desiree, and two overly aggressive sons, Elias, 5, and Eulisis, 3. Mom's completely exhausted from trying to do it all, while Dad's frustrated and often unwilling to step up to the plate. Meanwhile, Desiree's developing a bad attitude and her grades are plummeting. And Elias and Eulisis are learning the wrong lessons -- that kicking, screaming and crying pay off to get what they want.

Stay-at-home mom Joey-Lynn and her husband, Glenn, have five spirited daughters and a granddaughter all living under the same roof, and the exhausted couple have abdicated discipline. Their oldest, Samantha, 20, had a child as a teenager -- their granddaughter Krissy, now age 2. Joey-Lynn and Glenn had Samantha when they were teenagers themselves, and feel as if they have failed as parents since Samantha had a promising future that has been changed by her young motherhood. Samantha and her next-oldest sister, Brooke, 17, despise each other and curse at each other in front of the younger siblings -- Savannah, 10, Hailey, 6, and Haidyn, 1+1/2 -- who in turn act out with boundary-pushing and aggressive behavior. Mom defers all discipline to Dad, who simply yells and doesn't follow through.