The phrase "And now for something completely different" is taken from a real phrase often used by the BBC during their TV and radio broadcasts.

The usual casting process for a sketch was that the lead role would be given to the member who came up with the idea. Michael Palin has said that if he'd known the abuse he would have to tolerate as the "It's..." man, he never would have suggested the idea.

The first few episodes were filmed in front of an older audience, due to the BBC Program Planners. Apparently, some of these older people thought they were actually going to see a circus. Many of the audience members didn't really understand what was happening, and the cast realized they weren't laughing as much as they should. Consequently, they asked family and friends to come to the studio for tapings so that there would be more laughter. Eventually, the BBC Planners recruited younger audience members, but also aired the show at a later hour, making it difficult to get younger viewers at home. As a result, the Monty Python troupe were constantly poking fun at BBC Program Planners, insinuating that they were uneducated and dim: stupider than penguins, easily replaced by penguins, being unable to be a Planner if you've got a degree, and even an entire sketch in "The Light Entertainment War," where particularly stupid Planners sit around a table talking nonsense.

Following a television interview in which Graham Chapman mentioned (not for the first time) that he was a homosexual, the Pythons received a letter from an enraged woman who said she heard an "anonymous" member of Monty Python had confessed to being gay. She enclosed several pages of prayers for his salvation and said that if he repeated them every single day he might acquire some form of purgatory. Eric Idle replied to her saying that they had found out who it was and had stoned him. Shortly thereafter, John Cleese left the show for the last season. The woman never wrote back.

The internet term "SPAM" was inspired by the series episode Monty Python's Flying Circus: Spam (1970) depicting a restaurant scene with a menu that offered a mandatory helping of Spam with each and any ordered item.

The Pythons did almost all of their own stunts, including Graham Chapman (a qualified mountaineer) reading a sketch while hanging upside-down on a rope, and Michael Palin plummeting 15 feet into a canal in "The Fish-Slapping Dance" after John Cleese smacks him in the head with a trout.

After three seasons of 13 episodes each, John Cleese refused to return for a fourth because he believed the show was becoming repetitious and had run out of ideas. The rest of the cast only managed to produce a final fourth season of just six episodes without him. Despite this, Cleese had a writer's credit on most of the final six, because of sketches used that he had contributed to before leaving. He also had a cameo in one episode, and has continued to collaborate with the other Pythons in various combinations over the years.

The BBC made the Pythons edit out the word "masturbation" from the "All-England Summarize Proust Competition", in which one of the contestants (Graham Chapman) claimed his hobbies included "golf, strangling small animals and masturbation". While the vocal track was edited to remove the last word, the huge laugh from the audience remained in the final recording. During one of the negotiation meetings on the topic, Eric Idle reportedly asked the head of the BBC, "Everyone masturbates. Don't you masturbate, sir?" He was not given a response.

One of the first things the Pythons decided was to get rid of the obligatory, though often disappointing punch line of most comedy sketches. The "Restaurant Sketch" (or "Dirty Fork Sketch") pokes fun at this.

This series was one of the first to deviate from the norms of television credits. Among the odd credits gags were: an episode where the credits scrolled sideways, credits that used gag names for the cast & crew; ending credits rolled at the beginning of the episode (or the opening titles delayed until nearly the end), and credits that roll a few minutes early, followed by spoof versions of BBC broadcast announcements (even incorporating the BBC "rolling Earth" logo in use at the time).

The theme music is the opening portion of John Philip Sousa's "Liberty Bell March". Reportedly, one of the chief reasons was that it was in the public domain, meaning no royalties would have to be paid.

The Knight in shining armour who crops up sporadically throughout the show was in fact played by Terry Gilliam, the American member of Monty Python, who normally provided the animated sequences. He would work seven days a week on them, and usually two-all nighters.

Carol Cleveland appeared in 34 of the show's 46 episodes. Though the six members of the Python team never shied away from portraying women, they realized the necessity of Cleveland whenever an attractive female was needed.

Terry Gilliam was the only American in the group, and although he appears occasionally on-screen, his roles were generally non-speaking or with few lines. Gilliam's primary contributions, the animated sequences that "linked" the various live sketches, were one of the the key components that set Flying Circus apart from its peers, and remain among the most memorable elements of the show.

The head of comedy at the BBC said that the title had to include the word "Circus", because the people at the BBC had referred to the six cast members wandering around the BBC offices as a circus, so they added "Flying" to make it sound less like a real circus and more like something out of the first world war. And in front of that, added "Monty Python" because it sounded like a really bad theatrical agent, and also that the large, constricting snake was appropriate imagery.

The Pythons wrote all of their sketches in teams. Cambridge graduates John Cleese and Graham Chapman wrote together, as did Oxford men Terry Jones and Michael Palin. Eric Idle, another Cambridge alumnus, wrote alone. "Links" between sketches were the only pieces written by the entire group collectively. Animator Terry Gilliam worked independently of the five core members, but joined them for writers' meetings to help them piece it all together and act as a sort of test audience.

Although the Ministry of Silly Walks is one of the most popular gags in the Monty Python canon, John Cleese has no particular warm feelings for it. He admitted that the idea was born during the filming of the show, when the group would get bored between takes. In one such instance, Cleese came up with his silly walk in order to amuse the rest, who immediately thought it as a great idea for an entire sketch. Cleese felt the laughs it generated were cheap ones, and no balance was provided by what could have been the true satirical centrepoint.

Other possible names for the series were "Gwen Dibley's Flying Circus", "Owl-Stretching Time" (which was used as the name for one episode), "Bun, Whackett, Buzzard, Stubble and Boot", "A Toad Elevating Moment", "Sex and Violence", "A Horse, a Bucket and a Spoon". One early working title for the series was simply, "It's..."

The main logo for the show (as seen in the end credits) is written in the same font as the similarly-named Pussy Galore's Flying Circus from the James Bond film Goldfinger (1964).

Doctors, lawyers, politicians, academics, and police officers were frequent targets for sketches. Graham Chapman was a qualified (but never licensed) physician, and the son of a constable. John Cleese attended law school. Terry Gilliam majored in political science. Terry Jones and Eric Idle majored in English.

At least two sketches can trace their origins back to David Frost Presents: How to Irritate People (1969), a TV special that John Cleese starred in and wrote with Graham Chapman. The "Silly Job Interview" in which Cleese rings a bell and has people score Chapman's reaction, came directly from the special. The "Parrot Sketch" was adapted largely from a sketch about a car salesman who flatly refused to admit that there was anything wrong with a car that was literally falling apart on stage.

The Pythons were inspired by Spike Milligan and The Goon Show more than anything else, but they wanted their humour to be impossible to categorise, so the term Pythonesque was coined to describe it. Terry Jones jokingly said that the fact they'd inspired a new word in the dictionary shows how miserably they had failed.

Although it later became John Cleese's famous line, Eric Idle was the first Python to say "and now for something completely different."

Despite its ground breaking reputation and huge influence on a generation of comedians and writers, John Cleese believes that much of the show has not aged very well. He feels that only about one or maybe two sketches in each episode still retain their quality and impact and the rest of the writing and production is weak, rather amateurish and under rehearsed.

Asteroid 13681 is called "Monty Python".

The famous "Four Yorkshiremen" sketch is not (originally) Monty Python. They performed it at some concerts, but it first appeared on At Last the 1948 Show (1967), performed by Tim Brooke-Taylor, John Cleese, Graham Chapman, and Marty Feldman.

The entire videotape library of the series came close to being completely disposed of by the BBC as per their prevailing policy of recycling videotapes as a cost saving measure and with no idea at that time of how commercially valuable such archived material would be. Fortunately, Terry Gilliam learned what was about to happen and personally arranged the personal purchase of all the videotape masters of the series and stored them at home. Subsequently, when the BBC was persuaded to re-air the series with the troupe's growing popularity, they had to approach Gilliam for permission to use the tapes he preserved.

The show premiered in the U.S. after it was off the air in the UK. Its first U.S. broadcast was on KERA, a PBS station in Dallas, TX, in July 1974.

Ranked #5 in TV Guide's list of the "25 Top Cult Shows Ever!" (30 May 2004 issue).

According to John Cleese, when he and the fellow Pythons were pitching the show to the BBC, they went into a meeting not having prepared anything. When asked what the show would be about and feature, they reportedly stated that the show would be a "comedy, with some skits in it", and that it would possibly feature occasional guest stars. The men got the green light from the studio mainly based on this vague pitch, and because the show would be cheap to produce, since it involved mainly studio work with a limited cast.

The 'foot' featured as a Python logo is a detail from a genuine painting by Bronzinno.

The first three episodes filmed were aired in reverse order. Monty Python's Flying Circus: Whither Canada? (1969) was filmed September 7, 1969, and aired on October 5, 1969. Monty Python's Flying Circus: Sex and Violence (1969) was filmed August 30, 1969, and aired October 12, 1969. Monty Python's Flying Circus: How to Recognise Different Types of Trees from Quite a Long Way Away (1969) was filmed August 14, 1969, and aired October 19, 1969.

Although the fourth series (after John Cleese had parted ways with the group) shortened the title to simply "Monty Python," the title "Monty Python's Flying Circus" DOES still appear at the beginning of the introduction.

John Cleese was Rowan Atkinson's idol growing and inspired him to be a comedian. Rowan Atkinson performed with the Monty Python cast in the Secret Policeman's Ball and John Cleese made a cameo in one show of Not The 9 O'clock Show (1979) (TV Show) which Rowan Atkinson was a regular performer.

The Scott of the Sahara sketch features Carol Cleveland acting in a trench. According to the UK Telegraph, it's not unusual for tall Hollywood actresses to act in trenches.

DVD EASTER EGG: On the region 1 DVD box set (produced by A&E), each disc's main menu is a cartoon policeman who opens his coat to show a female body, which is then (mostly) hidden by the episode selection menu. If you sit at this menu without making a selection, about every 30-40 seconds, the policeman's eyes move.

David Jason believed the show was the grown-up version of Do Not Adjust Your Set (1967) that Terry Jones, Michael Palin' and Eric Idle had wanted to do on that show. He expected to be asked to join the series after working with them but was sidelined.

David Jason believes the series important in the history of comedy.

The Dennis Moore character, played in the Dennis Moore sketches by John Cleese never went on to have his own spin-off sitcom.