Flowers, which ran through the week on Channel 4, was a true hen's teeth rarity: we were witnessing, I think, the invention of a new genre. I'm just not sure quite what it was. Thorny, yes, prickly and awkward. Bleakly black too. Resoundingly human and truly funny. Above all, the singular vision of show runner (and writer and director and co-star) Will Sharpe, an Anglo-Japanese former Footlights president. What I do know is that I could have watched it all year long.

There were elements of Roald Dahl and Japanese anime, of Black Mirror and of Alan Ayckbourn, of fairytales for children who drink. Essentially the tale of a depressed writer and his savagely dysfunctional family, as the week wore on it became more forgiving. It's a sign of good drama when there's strength in depth of casting, and there were relishably chunky cameos for Angus Wright and Anna Chancellor as the true grotesques of the piece. But the family itself, the Flowers, survived near fatalities and worse to emerge, if not triumphant, then hugely and recognisably normal.

Olivia Colman, now forgiven the occasional misstep in The Night Manager, was back to all her charm and glory. We have grown used to seeing Colman in full-teeth mode, but she'd obviously been hiding a seventh set: no one else can hiss the accusatory "blabbermouth" while still blinding the world with a smile so wide nor so full of brittle self-doubt. Then there was Daniel Rigby as the son who bores everything but the pants off women, and Sophia Di Martino as sis Amy, the tender fulcrum around which much revolves. Above all, Julian Barratt as father Maurice, who conjures worlds of depression from just a pocketful of mumbles. The sadly salient point came on Thursday, when Deborah (Colman) attempted to reach the heart of Maurice's depression: we can fight it, she says, fight the monster together, maybe just with love. A shaggy shake of a sorrowful head. "No. Love just makes it worse." Truthfully, a week-long gem.

From what I can best deduce from the first two episodes of Flowers, writer Will Sharpe is attempting to create some sort of British version of Arrested Development. He's certainly taken elements of the American show most notably a family full of eccentrics led by suicidal children's author Maurice (Julian Barrett) whose family pile is in the middle of the countryside. Maurice is married to Deborah (Olivia Colman) who is constantly trying to put a brave face on things despite having a husband who doesn't love her and two emotionally repressed children. Maurice and Deborah's twins Donald and Amy (Daniel Rigby and Sophia Di Martino) are both in love with their neighbour Abigail (Georgina Campbell) however both don't quite know how to show it. There are also a gaggle of characters surrounding the Flowers family including a sort of manservant played by Sharpe himself and Abigail's awful plastic surgeon father George (Colin Hurley). What Flowers was missing for me was a sort of proxy for the audience to show us how truly awful the family are, similarly to what Jason Bateman did in Arrested Development. But Sharpe failed to create any sort of normal character and therefore I struggled to relate to anything that happened to this catalogue of quirky arty types who didn't seem particularly well-drawn to me. Even the set pieces of the first two episodes, notably Deborah and Maurice's engagement party and the death of Maurice's mother, did little for me as their use of grotesquely-drawn humour has been done better elsewhere most notably in the work of Steve Pemberton and Reese Shearsmith. Despite the fact they were ill-served by a script that thought it was a lot cleverer than it was I felt the cast did well regardless. Olivia Colman did as much as she could with the material she was given and I at least found her character tolerable in small doses. Additionally I felt that Georgina Campbell did well in portraying the only normal character of the bunch in Abigail and I thought if she'd been more prominently placed in these first two episodes I may have watched more. But by the time Maurice's mother had snuffed it at the end of the second episode I felt my time to depart the Flowers family had come as well as they'd struggle to make much of an impression on me over the hour that I'd spent with them. Although there were small flourishes of promise in Sharpe's writing, I felt he over-egged the pudding too much with his characters being too over-the-top to care about and the situations far too outlandish to ever buy into.

What we're watching: Flowers

Have you been watching Flowers, Channel 4's excellent new dark comedy drama? If not, we highly recommend you give it a try.

TV review: Flowers

A strange and saturnine new drama-comedy series from the pen of Will Sharpe, Flowers opened with Julian Barratt's writer, Maurice Flowers, attempting to hang himself from a tree near his family's rural cottage. It got darker from there.

Flowers: Channel 4's peculiar, poetic comedy treat

Sad, strange and very funny comedy drama Flowers stars Olivia Colman and Julian Barratt.

Channel 4 are broadcasting this new sitcom every night this week. I don't like that approach. It's like a cowardly version of "bingeing". Netflix and boxsets allow you to binge in the proper sense: watching episodes without any breaks, conversation or daylight. That's how you properly binge-watch. Having a new episode each day must be terrestrial TV's version, but no - either bombard us so we can wallow like pigs, or drip-feed us an episode once a week, lending it some nice anticipation.

So does this new series merit the special treatment of a daily outing? On paper it should: it has an impressive cast (Olivia Colman and Julian Barratt are the stars) and it's a dark comedy about an eccentric family. The father has bungled his suicide and the mother is frantically cheerful, her manic persona hiding unhappiness and sexual frustration. Their household also contains two weird and warring adult children, a senile granny, and a boyish Japanese assistant.

Tonight, the family are thrown together to celebrate mum and dad's anniversary but the dark comedy never quite darkens enough and seems zany rather than black and clever.

Black comedy normally draws on a juxtaposition between disturbing subject matter and glib humour. Instead, Will Sharpe's six-part series - set in the shambolic rural home of the Flowers family (played by Julian Barrat, Olivia Colman, Daniel Rigby and Sophia Di Martino) and screening every evening across the week - intermingles its knotty and desperately sad plot with the kind of comedy that litters our lives no matter what state they are in. The heartbreaking and hilarious result sets a new standard for situation comedies everywhere.

Flowers: Colman and Barratt come together to fall apart

This melancholic new comedy features a married couple at odds and jokes as twisted as the staircases. We meet the stars and wunderkind creator.

Flowers: Channel 4's peculiar, poetic comedy treat

Sad, strange and very funny comedy drama Flowers, feat. Olivia Colman and Julian Barratt, starts tonight on Channel 4...

Julian Barratt and Will Sharpe interview

The star of new Channel 4 comedy Flowers joins writer Will Sharpe to discuss their dark new series.