The first episode aired on 29 April 2014 at 21:00, receiving 8.64 million viewers, as the second most watched show of the week (commencing 28 April 2014) for BBC One. The BBC reported that the show received an average consolidated audience of 8.21 million viewers over six episodes and an additional 8.1 million requests for the show on
BBC iPlayer.
Radio Times called
Happy Valley a "word-of-mouth hit" which "steadily became a success outside the normal audience for the slot and channel." After episode one aired,
Ofcom received four complaints under the category "violence and dangerous behaviour", but they did not pursue the matter. Reviews from the media have been overwhelmingly positive, and the show has received a 100% rating on
Rotten Tomatoes. On
Metacritic, seasons one, two and three of the show received ratings of 83, 84 and 93, respectively. However, some reviewers have criticised the show for its graphic content, especially in episodes three and four of season one, while others have noted the ubiquitous typecasting of male characters as either weak or criminals. In response to the criticism,
Happy Valleys creator-writer, Wainwright, defended the show as "a quality, well-written drama" and stated, "Judging by the amount of email, texts, tweets I've had, I don't think anyone is asking me to apologise." In an interview with the
Radio Times, Wainwright said the level of violence had been carefully considered, and it was done responsibly, by showing the psychological and physical damage suffered by Catherine. Other critics have praised the show. Vicky Frost of
The Guardian wrote: "To get hung up on the violence of this BBC1 kidnap drama misses the point. It is beautifully written by Sally Wainwright, draws an astonishing performance from Sarah Lancashire—and between them, they have created something truly unmissable." Gerard O'Donovan of
The Telegraph called
Happy Valley "complex, thrilling and brilliantly written and acted", and "one of the best watches of 2014". In September 2019,
The Guardian ranked the show 11th on its list of the 100 best TV shows of the 21st century, calling it "a corrective to cliché-ridden and frequently blokey police procedurals", and one that "pulsated with poignant realness". The final episode of series 3, the final series, garnered much praise from critics. Lucy Mangan, writing for
The Guardian, called the episode as "[b]rutal, tender, funny, compelling and heartbreaking"; Anita Singh, reviewing for
The Daily Telegraph, rated the episode 5/5 stars and claimed, "
Happy Valley sounds so bleak on paper, with its storylines about drugs, rape and murder. But at its core is the love that Cawood has for her family. Wainwright gave us what we wanted: a happy ending for a character who truly deserves it"; Peter Stanford writing in the
Telegraph highlighted the various religious themes, with Cawood taking on "the appearance of a living saint" amidst the evil and misery of Happy Valley. Positive reviews were also published by
The Times and
I, who rated the episode 5/5 stars. After the final episode aired, Labour Shadow Home Secretary
Yvette Cooper promised to increase the number of community police officers by 13,000, citing Catherine Cawood as a positive influence for these officers. ==International==