Blue Peter is well regarded as one of the squeakiest clean shows on kids TV, offering inspiration to generations of youngsters since it first was broadcast in 1958.
Mostly broadcast live, the show's set of presenters take on outdoorsy challenges, as well as arts and crafts - "here's one I made earlier"! - and celebrity guests dropping by to perform or chat on the famous Blue Peter sofa.
Many millennials will feel nostalgia for the era when the likes of Katy Hill, Konnie Huq and Simon Baker presented the show around the turn of the millennium.
But the show has also experienced its run of mishaps, from dangerous moments of filming on set from 'hellish' challenges and drug use.
Here are the secrets from the Blue Peter set.
Richard Bacon's cocaine scandal
In 1998, one of the Blue Peter presenters, Richard Bacon, was sacked from the show following his admittance that he had taken cocaine.
The now-defunct newspaper News of the World reported the story at the time and Richard was forced to hand back his Blue Peter badge amid much tabloid scandal.
Speaking recently, Richard said he believes the whole situation would have been far worse if the scandal had happened in the age of social media. "My experience on Blue Peter would have been very different if social media had been around," he told The Sun.
"The intensity of the storm is even more fierce and more frightening now. If you’re caught up in a massive scandal there are probably tens of thousands of tweets about you.”
“Cancel culture is about rushing to judgment. I’d love us all to slow down, go, ‘Stop, let’s think about this. Does this person really deserve never to have a career?’"
Speaking on Mel Giedroyc: Unforgivable, Richard joked that when the producers would shout "that's a wrap" at the end of the shows, he'd shout "where?". A wrap is a term for the way some drugs can be stored.
The Blue Peter dog that secretly died
Petra the dog was a Blue Peter mascot from 1962 to 1977, and would frequently appear on the show. She was the first Blue Peter pet and was much loved by viewers.
However, it would later transpire that the original Petra dog had died a few days after she had first appeared on Blue Peter in the show's very early days.
But instead of telling the viewers, it was decided that a new similar-looking dog should be bought in and called Petra instead, so no-one would know the original Petra had sadly passed away of distemper, a viral disease.
The trick worked, and it was only in 2008 that the secret about Petra was revealed when former editor Biddy Baxter wrote about it in her book, Dear Blue Peter.
"It was the dog's first and last TV appearance. Two days later she died of distemper," she wrote.
"It was unthinkable to traumatise our youngest viewers by giving them the sad news, so the producer Edward Barnes and I set off in his Mini to trawl London for the dead pup's lookalike.
"It wasn't until we reached Lewisham that we struck lucky. In a dingy shop window there was one small browny-black puppy, shivering in the corner of a pen. Not a single viewer spotted the swap."
"Hellish" challenges
1990s presenters Simon Baker and Matt Thomas underwent a two-week Royal Marines Parachute Regiment selection process for a segment on the show, and filming was tricky for those in front of the camera and behind it.
“That was a very hard film for them to do and probably the hardest for the producers as well,” says producer Alex Leger, who worked on Blue Peter for 36 years, speaking to The Northern Echo about his book, Blue Peter: Behind The Badge.
"They tested aggression with three minutes bouts in which they pair them up and they beat the hell out of each other."
According to Alex Leger, Baker said of the filming: "We knew it was going to be hell."
Much earlier, in 1977, presenter John Noakes was tasked with climbing Nelson's Column in Trafalgar Square by using a ladder to clean pigeon droppings from Nelson's head, but Alex Leger remembers this was years before health and safety measures.
Leger revealed it was a more treacherous climb up than they had realised. “John was taught how to rest his arms and legs through the rungs on the way up," says Alex. "What he didn’t realise was that the ladder leans out at an angle of 20 degrees at the top and he had to climb that before raising himself on to the plinth."
But then when a sound problem meant they had lost the audio from the top part of the climb, presenter John had to climb back up again - all in the name of good content.
“To my surprise and relief John complied without a murmur of complaint. Not for the first time I marvelled at his courage,” says Alex.
Presenter starred in 'porn'
In the 1980s, presenter Peter Duncan became the first to complete two stints on the show, 1980 - 1984 and 1985 - 1986. He was also revealed by a tabloid at the time to have starred in what they'd called a 'porn' film, called The Lifetaker.
Others pointed out that the art house-style film wasn't exactly a porn film, even if Peter did appear in minimal clothing.
Reports from the time reveal how parents had already decided against him though, for wearing baggy jeans and appearing scruffier than daredevil presenter John Noakes, who Peter replaced on the show.
In 2014 Peter tweeted: "For your pleasure on my 60th a trailer from my 1973 'porn' film that caused trauma and headlines," sharing a clip of the trailer for the film.
Konnie Huq and the phone-rigging scandal
When phone lines went down during a live call-in segment, producers lined up a young girl who was on a studio tour of the building to pose as a caller - she then got through live on air and spoke to presenter Konnie, who the presenter treated as a real caller.
She quickly won a prize for guessing the identity of a mystery celebrity even though she wasn't a real viewer calling in.
Richard Deverell, controller of BBC Children's Television, said in a statement: "The decision to put a child on air in this way was a serious error of judgment."
Blue Peter presenter Konnie Huq told viewers live on air: "We'd like to apologise to you because when this mistake happened we let you down."
