Ramona Marquez

Outnumbered's spot-on portrayal of middle-class family mayhem is the very thing that can tip it towards the irritating. Over its three series, the joke has remained resolutely the same: given the right socio-economic background, precocious children will say the funniest things. And while there's always enjoyment to be had from the eccentricities of the Brockmans, there's now no escaping the faint whiff of the formulaic. In the final episode of the series, Pete (Hugh Dennis) deals with the fallout from his drunken infidelity and Jake (Tyger Drew-Honey) embarrasses himself with the baby-sitter. And there's a rare moment of tenderness when Sue's (Claire Skinner) latest obsession leads to Karen (Ramona Marquez) having an accident. "I've nearly killed the kids loads more times than you have," comforts Pete.

The fifth episode of the third series of the family comedy maintains the good form of last week's, fuelled by an early confrontation between Pete (Hugh Dennis) and Sue (Claire Skinner) and the typhoon-like arrival of Sue's sister Auntie Angela (Samantha Bond) and her ghastly American psychologist of a husband, Brick (Douglas Hodge). That's before an awkward restaurant meal dredges up Angela and Sue's acrimonious history. As usual, daughter Karen (Ramona Marquez) has her own opinion on the matter, deftly using her ingénue quips to throw a cold light on adult hypocrisy.

This is one of the funniest episodes to date. Last week, you may remember, Dad (Hugh Dennis) had woken up with a crippling hangover after a night out that involved green cocktails. It gets worse. It turns out that he danced with a woman called Mimi who kissed him - and he kissed her back - and now his wife (Claire Skinner) has found out. One way and another it could hardly be a worse time for the unspeakable sister (Samantha Bond) to arrive for a visit with her new boyfriend, an American therapist with a ponytail called Brick (Douglas Hodge). They all go out for a meal and the evening degenerates into a classic middle-class bloodbath, during which little Karen (Ramona Marquez) dissects the ponytail's psychobabble with lethal precision.

The family-centred improv' comedy has been a bit patchy of late but this episode is a corker. Tonight it's not just the kids who have been misbehaving, as Sue (Claire Skinner) discovers when she checks Pete's (Hugh Dennis) mobile for messages. But there's no time for a heart-to-heart when the kids are about.

If it's not Jake (Tyger Drew-Honey) turning the garden into a watery war zone, it's Karen (Ramona Marquez) asking if it's ever OK to hit a classmate.

Meanwhile, Pete's worried about the impending clash as Sue's sister Angela (Samantha Bond) turns up with her new husband (Douglas Hodge). While the adults struggle to remain civil, the children call a spade a spade - or, in Jake's case, reel off 18 names for a part of the male anatomy. Nudity and toilet habits also feature - but that's kids for you.

Indeed, some families might see this comedy more as a documentary. A funny one, mind.

The fourth episode of what has been an inconsistent third series of the sitcom following the travails of the Brockman family. Sue (Claire Skinner) is trying to prepare the house to show around potential buyers, at the same time as Pete (Hugh Dennis) gets ready for his colonoscopy while hung-over from a drunken night out. The children are up to their usual mischief, with Karen (Ramona Marquez) refusing to go to school and Ben (Daniel Roche) in trouble for playground antics. Though the show feels as if it's winding down as the children grow more knowing, on the form of this episode it remains more inventive than most of the competition.

Dad (Hugh Dennis) has woken up with a crippling hangover having being ambushed by bright green cocktails. His youngest son, Ben (Daniel Roche), is bitterly disappointed that he missed the sight of his father being sick. "Your face is all grey," he says, "like someone shaded you in with a pencil. You smell like the relief teacher who didn't last very long. The one with the shaky hand who kept bursting into tears for no reason." Because the day of Dad's hangover also happens to be Friday 13th, Karen (Ramona Marquez) is refusing to leave the house in case something bad happens and she is eaten by bears on the way to school. And to cap it all, this is the day that house hunters are coming round to view the house. Once again, Outnumbered provides half an hour of pure happiness.

It's Friday the 13th and superstitious Karen refuses to go to school in case something bad happens. She might, she insists, get mauled by a bear. Ben, meanwhile, asks his hungover father, "Dad, what's the point of living?" So just another day in their household. It's probably heresy to say so, but the series is starting to feel just that little bit predictable. But then complaining is churlish when it's given us Ramona Marquez (Karen), the best female comedian currently on the telly.

Once again Outnumbered provides half an hour of pure happiness. The episode begins with the two brothers at loggerheads. The younger one, Ben (Daniel Roche), has changed his brother's status on Facebook to "Jake is a transvestite", so Jake (Tyger Drew-Henry) responded by changing Ben's Facebook status to "Ben died on Tuesday". Meanwhile Dad (Hugh Dennis) struggles to explain to the children what a colonoscopy is ("Will we be able to watch it live on television?"), while Mum (Claire Skinner) makes a doomed attempt to try and explain to her 13-year-old son what is meant by the objectification of women. It's consistently funny, but best of all is the adult tennis match featuring Ben as a ball-boy and seven-year-old Karen (Ramona Marquez) as the referee.

One of the boys has been downloading "inappropriate" images of their teacher, which leads to an awkward family discussion about the meaning of inappropriate. But Dad (Hugh Dennis) tries not to worry. "They're just teenage boys," he tells his wife (Claire Skinner). "They're like baboons on heat. In school uniforms." Elsewhere in the house, five-year-old Karen (Ramona Marquez) is busy writing letters to President Obama. "I am beginning to lose my patience . . ." she begins. She is also developing a tough-love approach to prison reform. Prisoners, she says, should be put in holes in the ground. Occasionally soup should be poured in, forcing them to scoop it up in their hands. The trouble with children is that they don't appreciate the value of political correctness.

Outnumbered success relies on the partly improvised dialogue derived from the interaction of the three children and their screen parents in various situations: in last week's episode, a trip round London with dad Pete's mother in tow. The youngest, Karen (Ramona Marquez), nine, is the star, her dialogue pursuing paths of childish logic to which Pete (Hugh Dennis) reacts with probably real bafflement. In previous series the adults had more of the screen; here they are pulled into the background more as feeds for the self-confident kids, no doubt ruminating on the phrase attributed to WC Fields, "Never act with children or animals".