[1][2] The series revolves around the lives of five anthropomorphic animals who hang around the back of a pub in Millwall, the Isle of Dogs, London.

The show is aimed at an adult audience, features "neutering, incontinence, cannibalism and catnip overdoses" and has several humour styles such as slapstick and farce.

For example, the first episode begins with a scene in which Marion, portrayed as desperately trying to revive his deceased owner, learns she has actually been dead for four months, whereupon he casually gives his cat friends permission to eat her.

[6] Mongrels looks at the lives of five animals that hang around the back of a pub called The Lord Nelson in Millwall, on the Isle of Dogs in the East End of London.

The hero of the series is Nelson (Vulpus metrosexualus), a fox who lives a metrosexual lifestyle.

[10] Lastly, there is Vince (Vulpus cuntitcus), a violent, foul-mouthed fox who considers himself a proper animal and is Nelson's older brother.

[4] Miller described Mongrels as: "an adult sitcom, trying to do for puppetry what American shows like The Simpsons have done for animation.

[14] While Miller was working on a BBC Three sitcom he pitched the idea to producer Stephen McCrum.

This was done as a tribute to it, with Miller arguing that when The Muppet Show did it, "it just must have just knocked the socks off the people who saw it, because it's like nothing you've ever seen before, and we thought: 'Why fix what ain't broke, so we did our own very British version of that.

Miller, Brown and a third writer, Daniel Peak began to write scripts over a period of four years.

A pilot was eventually filmed and the BBC commissioned a full series, targeted at adults.

[14] When writing for the commissioned series began, the character of Nelson was originally depicted as being brash and obnoxious.

[12] Another chicken character called Wendy appeared in the first broadcast episode as a reference to Debbie.

Tetsell describes the voice as a mixture of, "every accent on the planet", but with the joke that Marion was meant to be a Persian cat.

During read-throughs of the scripts, a toy horn was honked whenever Kaye swore to give an idea of what it would sound like during the programme.

[6] Miller posted another, longer message online saying: Mongrels friends, it is my unbearably sad duty to announce that we will not be returning for a third series on BBC Three, a decision that has been made based on the fact that apparently you need more than two people watching a programme to make it successful.

I'd also like to thank, from the bottom of my heart, all the writers, cast, crew and support team who have made a horribly challenging show such an utter joy to make.

[20] Jane Simon of the Daily Mirror wrote: "While most of it is very funny, some of the gags about Harold Shipman completely misjudge the tone.

"[21] The Independent's Tom Sutcliffe said that: "It does have its laughs, though, because the script isn't entirely about crass shock value", but that the sitcom, while aimed at adults, is "not really for grown-ups.

[26] In 2012, Andy Heath & Iestyn Evans won the Royal Television Society Craft and Design Award 2011/12 for special effects in Mongrels Series 2, beating Downton Abbey and Great Expectations in the process.

On 13 August 2011, the cast of Mongrels took part in the first ever Comedy Prom, in which they performed the song "Middle Class is Magical" from the seventh episode of the first series, "Marion The Superfluous Feed Character".

[28] In November 2021, Nelson and Marion reappeared in a Puppet Aid sketch for the BBC's annual Children in Need telethon.

Mongrels has attracted anger from production company Fit2Fill which claimed the BBC "ripped off" their 2001 Channel 4 sitcom Pets.

Fit2Fill claimed they received 30 emails from people saying the series were similar, and they once pitched the idea of Pets to then BBC head of comedy Mark Freeland, who also acted as the executive producer of Mongrels.

We also notice that Mongrels' executive producer is Mark Freeland, to whom we did once pitch a Pets follow-up show.

If, as a viewer, you can sit down and say they are the same, then there is little point of making any new shows, if the slightest similarity (puppets and animals) can be suggested as idea stealing.