The time after which "adult" content, i.e. programs with a lot of intense violence, coarse language, 'naughty' bits, etc. can be shown. One interesting thing a character cannot do before the watershed is [[DiesWideOpen die with their eyes open]]. (Although, for some reason, being ''already dead'' with your eyes open is fine.)

Usually 9pm in the UK, the US and Canada. Somewhere between 8.30 and 9.30pm in Australia. In Japan, which has more liberal views on acceptable content to begin with, the "[[OtakuOClock Otaku Hour]]" starts at "25 o'clock" (1 AM). In Germany that would be 10pm for movies free for age 16+ and midnight for 18+ .

Compare to UsefulNotes/SafeHarbor, which is a legally defined characteristic of U.S. FCC policy. (It's like they're ''trying'' to make you need to get up and go to the bathroom with all this hydraulic terminology...) The period within PrimeTime but before the cutoff is also referred to as the "family hour".

Also note that in the UK, no such Watershed exists for Radio meaning there is a long list of words that can't be said under any circumstances; on the other hand, it means that some daytime or early evening programmes can get away with some quite obscene [[DoubleEntendre innuendo]].

Named for the earthen barriers at the edges of a farm field, which prevent irrigation water from crossing to a neighboring field. This allows two adjacent fields to be on very different watering schedules so that different crops can be planted there. When driving past a farm on the highway, you'll see row after row of (say) asparagus, then a watershed will pass and suddenly you're seeing row after row of rutabagas.
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!!Examples:

* Japan's [[OtakuOClock Otaku Hour]] has brought several anime series based on "[[HGame ero-ren'ai games]]" -- [[YouKeepUsingThatWord incorrectly known as "hentai games" in the US.]] These are usually cleaned up for TV and shown during the Otaku Hour.
* There are also live action dramas that play during Otaku Hour, usually with more extreme content than usual. Two examples spring to mind, both of which played on the same time slot on the same network -- a live action version of the adult manga / anime ''Hen'' (known as "Strange Love" in the US), which had a scene of the two {{Schoolgirl Lesbians}} skinny dipping and making out in the school pool, and ''Invisible Girl Ea'', revolving around the titular young woman Ea, who spends the entire 6 episode series very obviously nude with the excuse that clothing causes her invisibility powers to freak out.
* The fact that North America (the US and Canada especially) spans over a very large number of time zones makes the issue of a watershed time problematic. In Hawaii, Cartoon Network's ''Adult Swim'' starts at 7:00 PM.
** EST has Cartoon Network West, which airs Adult Swim until 9 AM. Family Guy is on at 6 and 6:30 AM.
** NickMom, NickJr's nighttime block starts at 4:00PM in Hawaii and 7:00PM in the Pacific time zone.
** When ''ErinBrockovich'' was on CTV, because of the timeslot it was in and the length of the movie, the first half of the movie was censored and the second half was not. It was quite the surprise to be greeted after the commercial break with a triumphant "fuck you!"
** Subverted by the [=CBC=], which doesn't really seem to care about the watershed; they've shown language to make a sailor blanch ''on the six o'clock news''. There are certain things only the [[WeWillUseWikiWordsInTheFuture MotherCorp]] can get away with. (The CBC is not a participant in the CBSC, the self-governing regulator set up by the private broadcasters.)
*** Although the [[MoralGuardians CRTC]] has hit them at least once.
** Los Angeles' CW affiliate is available on cable and satellite TV on the west coast going in as far as Arizona, which doesn't observe Daylight Saving Time.
*** Because of this, "post-Watershed" in America doesn't mean a whole heck of a lot, especially on Network Television. ''NYPD Blue'' gave us the occasional flash of male backside, but for the most part there's nothing you can see or hear post-watershed that you couldn't thirty minutes before (most American television writers are extremely hesitant to use anything stronger than the occasional "bitch"). On the other hand, cable is more relaxed than network, pay channels like HBO are more relaxed than cable, and the levels of what they get away with varies accordingly.
* For a while in the UK, the watershed seemed to be 9:'''30'''. There were episodes of Hell's Kitchen where Chef Ramsay would be bleeped for the first half hour, but not the second. Quite amusing.
** The watershed is not meant to be an absolute dividing line where anyone with any sensitivities should instantly stop watching, because it's recognised that people sometimes leave the TV on just to see what's next. Channels have been reprimanded when they've shown something at 9:00 which [[RRatedOpening immediately starts]] with a ClusterFBomb or a graphic sex or {{Gorn}} scene.
** Conversely, films [[UsefulNotes/MediaClassifications rated 15]] have been known to be screened with an 8:30 start on the rationale that most of the film will indeed be after the watershed. They'd be unlikely to get away with bending the rules like this for a film rated 18, though. Sky Movies has an 8 pm watershed for 15 films and a 10 pm watershed for 18 films.
*** The rules are ''slightly'' more relaxed for pay TV, although not much. A free-to-air channel would struggle to get away with the same thing.
* ''Series/DoctorWho'' (and ''Torchwood'', by extension) seems to be pushing the envelope as far as it can to see what it ''can'' get away with pre-Watershed. The parent programme is aired in one of the most successful television spots in the country (Saturday evening) and can get away with quite a lot including male-on-male kissing, dying with eyes open, several bondage scenes and Davros' shirtless scene. The second series of ''Torchwood'' had watered-down airings of episodes at 7pm on Wednesday, but was still quite risqué.
** Doctor Who has always done this, with its infamously high body count. The mid seventies in particular was especially graphic, often showing impalements, decapitations and blood squibs with brutally graphic detail.
** On the subject of ''Doctor Who'', Tennant's portrayal of Hamlet was aired in the early evening during Christmas 2009. Their interpretation of the famous CountryMatters line was so heavy handed you wonder how they got away with it.
*** If it's Shakespeare, it's educational!
* UK police drama Series/TheBill is an interesting case study. It started out in 1984 as a series shown in the late evening, after the watershed, meaning it had liberal cases of sex, violence and nudity (it was in this period that it was at its most gritty and realistic). In 1988 [[ExecutiveMeddling the production team]] decided to move the programme to be broadcast ''before'' the watershed, which meant such things were quickly toned down and, eventually, removed altogether. It ran in this pre-watershed timeslot for most of its life, however in 2009 [[ExecutiveMeddling the decision was made]] to move it ''back'' to being broadcast after the watershed, at 9pm.
* The watershed was outright invoked on ''TopGear'' in the "Top Ground Gear Force" special, since the special aired beyond the watershed when the show's normal timeslot is before it. A very annoyed James May stopped to verify the special was airing beyond the watershed before dropping a PrecisionFStrike. It was still [[CurseCutShort cut off]] by a hard cut to Richard Hammond, though.
* Lampshaded in TheLateLateShow, especially when Craig Ferguson does a lot of (censored) swearing.
** According to the censors, [[RobotBuddy Geoff Peterson]] can get away with a hand gesture resembling masturbation because he doesn't have genitalia.
* One of the most notable breaches of the watershed in Britain was the infamous [[SmarmyHost Bill Grundy]] interview with the SexPistols in 1976. Grundy provoked them into saying [[ClusterFBomb all sorts of swear words]] - during prime time viewing hours.
* The watershed was subverted by makers of ITV dramas timed to run between 8:30 and 10:00pm. Scenes of violence, swearing or nudity would be scrupulously avoided in the first half-hour. However, 31 minutes into the drama was a different matter entirely and usually heralded nudity, sex, swearing and violence, often all at once. ITV were accused by MoralGuardians of being cynical. But it was true that even though the show began at 8:30, the programme makers were still sticking absolutely to the letter of watershed rules, which had been designed to account for a change in programming between the 8:00 - 9:00 slot and the 9:00 - 10:00.
* Watershed in the Netherlands is 10PM with content carrying a 16 rating not allowed before that time. After 10PM everything goes (even hardcore pornography), which led to porn classic ''Deep Throat'' being screened on the publicly funded BNN.
* In Chile and other Latin-American countries, the [[SoapOpera telenovelas]] aired after 10:00 PM are ''notoriously'' HotterAndSexier and often DarkerAndEdgier than those aired during the day.
* Australia's watershed is mostly taken advantage of for comedies who want to swear, and for showing older action films that warrant MA or even R ratings today. This means that whenever ''Film/DieHard'' or ''[[Film/Terminator2JudgmentDay Terminator 2]]'' etc are shown, they always start at 10:00 PM, but will be completely uncensored. The result of this is that the ad breaks inevitably get more and more sexual as it gets closer to midnight.
* ''EverybodyLovesRaymond'' - This American dom-com presents a different sort of watershed issue on British TV. Channel Four in the UK screens ELR on a repeating loop in the early part of the morning (between eight and ten am). This appears to be designed so that it can be recorded and replayed later in the day by people getting ready for a day's work who are too busy for TV. But two Season Six episodes have never been screened by C4 for what are presumed to be pre-watershed reasons: the content of ''Marie's Statue'' (suggestive artwork) and ''No Roll!'' (Ray and Debra's sex life) are deemed too extreme for daytime viewing by British audiences. Which is strange, as both were screened in prime-time in the notoriously more conservative and prudish USA without problems. So should be a shoe-in for British TV. Evidently not....
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