Question: What year did Showtime order a 4th season?
About the article "Nurse Jackie", section "Development and production".

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David Lloyd, Greg Antonacci and Gary Nardino respectively created and developed "Brothers" in 1982, with the same format as what made it to the air.
Lloyd, a veteran TV writer known for his work on "The Mary Tyler Moore Show", "Taxi" and the then-new NBC sitcom "Cheers", had the premise for this series suggested to him by his employers, successful TV producers Ed.
Weinberger and Stan Daniels.
Wishing to develop a new screenplay with a revolutionary theme, Lloyd took to Weinberger and Daniels' idea about exploring familial relationships with the presence of a major—and controversial—life change, that of a relative finally coming out and addressing his homosexuality.
Lloyd fully developed the idea, assumed full creation credit, and partnered himself with Antonacci, a young actor-turned-director and producer, and Nardino, another up-and-coming producer, to write a pilot script with a modern, relevant point of view.
The relationship of three adult brothers, inseparable and living in a world strongly underscored by masculinity, who soon have to confront the youngest brother's decision to be openly gay, quickly came to fruition in the screenplay aptly titled "Brothers".
The project was originally shopped around to broadcast networks NBC and ABC, in hopes of being picked up for the 1983 fall television season.
NBC agreed to screen the pilot due to Lloyd's work on "Taxi" and "Cheers" (both of which had aired on NBC during the 1982-83 season), and due to the insistence of Weinberger and Daniels.
The network suits (then headed by Brandon Tartikoff) saw the charm of the content, but were concerned about how homosexuality was going to be portrayed.
NBC did put "Brothers" in the running of fall 1983 pilots, but ultimately passed on it, instead choosing a series from Weinberger, "Mr. Smith", in its place.
Lloyd, Antonacci and Nardino then offered "Brothers" to ABC, who instantly shot it down because of its dealings of gay themes.
The creative team refused to give up hope on the project, and the same was said for its three leads, which from the beginning were Robert Walden (fresh off his Emmy Award-winning role of Joe Rossi on CBS' "Lou Grant"), Paul Regina and Brandon Maggart.
As the producers tried to find a new outlet to pitch it to, development was put on hold, allowing Regina to co-star in CBS' short-lived "Zorro and Son" (1983), and Maggart to assume a role on NBC's "Jennifer Slept Here" (1983–84).
Eventually, Lloyd and company were approached by Showtime, who at the time had successfully begun to venture into the new field of original pay-cable TV series.
In 1983, the channel had been the first in history to revive a canceled network series for original cable broadcasts, with "The Paper Chase" (which originally ran on CBS in 1978-79).
Showtime's mission was to produce and pick up original programming that was outside the boundaries of standard network TV fare, and saw "Brothers" perfectly fitting that mold.
Both parties struck a deal that had its cast paid at the same rate as network stars, with a full out 26-episode order from the start.
Fortunately, Lloyd didn't have to scramble around to recast two of his stars, since Regina and Maggart both saw their series get canceled, so his original choices were back in place.
With the series' premiere in the summer of 1984, Showtime now boasted one more first — the first original situation comedy on cable TV.
Said Robert Walden of his experience working on Showtime, "There are fewer cooks in the kitchen, and the writers have more freedom.
There's also something to be said for playing to 5 million or 6 million viewers instead of 30 million.
You're reaching a higher common denominator."
Since Nielsen Media Research had not yet adapted its ratings system to measure audience levels on premium cable, Showtime relied on what it called "qualitative research" rather than sheer statistical reports.
"We have research firms that do telephone interviews with our subscribers," explained Peter Chernin, a Showtime programming executive.
"They call people and ask them how much they like particular shows.
We also take into account the opinions of our local affiliates.
All of them rated "Brothers" very highly.
"Unlike the policies set at rival HBO, who had no intention of preparing any of their first forays into original series for syndication, Showtime had the market in mind as soon as they picked up "Brothers".
Since "Brothers" had such a successful first season by pay-cable standards, channel execs announced two unprecedented moves in the spring of 1985: not only would "Brothers" have a renewal for 50 more episodes, but the series would begin airing episodes simultaneously in broadcast syndication that November.
Showtime giving the series such a large vote of confidence with two-season renewal was so history-making that never had a broadcast network given a series such an expansive episode order after its freshman year.HBO criticized their competitor's decision over the early syndication airing of "Brothers", stating that they would never engage in such a practice with any of their original series.
They felt it would destroy subscription rates and revenue if the public could watch one of their series for free on a local broadcast station, rather than pay monthly to view it on HBO.
Showtime later recanted their 1985 syndication rollout for "Brothers", and then fought back by saying that their subscribers had a five-year head start on all their shows, which were all prepped for syndication and of which would enter it after those five years.
Their defense also included the facts that the parent studios of their shows would continue to receive royalties from strong rerun performance in syndication, and that the latter market would attract higher-profile writers and directors to ensure a more quality production.
The alternative, as Showtime put it, would be not prepping series for syndication and thus taking a gamble on a relatively unknown or untested creative team.
As premium cable found its way with successful original programming, HBO would follow suit in what Showtime realized all along concerning syndication, and both would find that concurrent airings of cable series on broadcast TV wasn't so risky.
In 1988, Showtime made history once again when they struck a deal with the young Fox Broadcasting Company to begin airing their "Brothers" stablemate, the smash hit "It's Garry Shandling's Show", on Sunday nights in order to raise Fox's profile among the broadcast networks.
Not only did "It's Garry Shandling's Show" fulfill its mission for Fox, but it actually increased interest in Showtime, and subscription rates benefited. 
In 1991, HBO and Cinemax debuted the first premium television multiplex service in the United States, Showtime soon followed with the testing of its secondary service, Showtime 2, on October 1 of that year on two systems operated by TeleCable (one of these systems, TeleCable's Racine, Wisconsin operation, had also participated in the multiplexing test for HBO and Cinemax).
In April 1994, Showtime announced the creation of a new themed multiplex service, consisting of five channels: Spanish language service Showtime En Espanol, family-oriented Showtime Family Television, action-oriented service Showtime Action Television, a service featuring comedy films and series called Showtime Comedy Television and an all-movie channel called Showtime Film Festival.
This planned extension to the multiplex did not come to fruition – although a third multiplex service, Showtime 3, would make its debut in 1996.
The multiplex would eventually expand over time with the launch of the action film channel Showtime Extreme on March 10, 1998, followed by the debut of the science fiction channel Showtime Beyond in September 1999.
Three additional themed channels made their debut in March 2001: Showtime Family Zone (which carries films intended for family audiences), Showtime Next (a channel featuring films and series that appeal toward adults between the ages of 18 and 34 years old) and Showtime Women (a channel featuring films and Showtime original programs that appeal toward a female audience).
The programming format of Showtime 3 was overhauled five months later on July 1, 2001 to focus on theatrical movie releases and Showtime's original made-for-cable films, that channel's name was also changed to Showcase.
Showtime Family Zone, Showtime Next and Showtime Women do not have distribution by most pay television providers as extensive as the other Showtime multiplex channels.
The availability of either of the three channels on cable providers varies depending on the market; Dish Network carries neither channel; and DirecTV carries Showtime Next and Showtime Women, but not Showtime Family Zone. 
Year in parentheses denotes when channel was brought into the Showtime Networks fold.
Showtime (1983) *SHO2 (formerly SHOTOO) (1994) *Showcase (formerly Showtime 3) (1996) *Showtime Extreme (1998) *Showtime Beyond (1998) *Showtime Next (2001) *Showtime Family Zone (2001) *Showtime Women (2001) The Movie Channel (1983)1 *The Movie Channel Xtra (1999) Flix (1992) Smithsonian Networks (2007)2 1Channel created by Warner-Amex Satellite Entertainment prior to 1983.<br>2Co-owned with the Smithsonian Institution.
Showtime Networks handles operations.
Showtime Women, Showtime Family Zone and Showtime Next are digital cable services of Showtime and are not available on Dish Network.
DirecTV does carry Showtime Women and Showtime Next in HD only.
Flix is only available to DirecTV and other satellite systems.
Flix was formerly carried on cable systems (as a premium service) in the early and mid 1990s.
Flix is now considered a specialty premium service to satellite customers who subscribe to Showtime Unlimited.
There are still cable providers that do carry Flix as a premium service with Showtime.
In 2008, Showtime Networks was honored at the 59th Annual Technology & Engineering Emmy Awards for Outstanding Achievement in Advanced Media Technology for Best Use of Commercial Advertising on Personal Computer for the companion website to the series "The L Word". 
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