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

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  Showtime (TV network), a premium subscription television brand * Showtime Networks, a division of CBS which owns the Showtime brand * Showtime (brand), worldwide stations using this brand, including: ** Showtime Arabia, formerly the dominant subscription television service in the Middle East and North Africa ** Showtime movie channels, a suite of Australian premium networks owned under a studio consortium which licenses the Showtime name ** Showtime Scandinavia, a television channel broadcasting action movies to the Nordic countries  "Showtime" (film), a 2002 American action/comedy film  "Showtime" (variety show), now known as "It's Showtime", a Philippine noontime variety show  "Showtime" (Croatian TV show), a Croatian talent show similar to "Pop Idol"  "Showtime at the Apollo", a syndicated music program  "Showtime" ("Buffy the Vampire Slayer"), an episode of "Buffy the Vampire Slayer"  "Showtime" ("M*A*S*H"), an episode of "M*A*S*H"  "Showtime", an episode of "Law and Order"  
In its first year, "Weeds" was the highest rated series for Showtime.
Its fourth-season premiere attracted 1.3 million viewers to Showtime, the channel's then-highest-ever viewership; the season as a whole averaged 962,000 viewers.
"Slate" magazine named the character of Nancy Botwin as one of the best on television and one of the reasons they were looking forward to the return of the show in fall 2007.
"TIME" magazine's James Poniewozik named it one of the Top 10 Returning Series of 2007, ranking it at #9.
"The New York Times" opined the show is "transforming for Showtime."
Metacritic scored season two, four and five a score of 78, 67 and 73 respectively. 
In honor of Holy Week, Showtime suspended the daily performances and reflected on the best highlights since the show's launch.
Also, the hosts looked back at the previous groups who performed at the show and what they gave back positively in this special time of the year.
However, in 2012, "It's Showtime" continued to air live for the next three days with a special letter sender segment with the usual "Arte Mo" and "Singing V".
In 2013, a Drama special was held in place of its usual format, featuring stories of Bida Kapamilya finalists as portrayed by Showtime hosts under the helm of TV Directors. 
After a dispute with the Apollo Theater Foundation in 2002, the original producers left to start a rival show called Showtime in Harlem later known simply as "Showtime".
"Showtime in Harlem" was produced at the Brooklyn Academy of Music.
The show was later moved to California and renamed "Live in Hollywood", lasting one season in 2003 with Shepard as host.
"It's Showtime at the Apollo" was subsequently produced by de Passe Entertainment.
It was for a time, hosted once again by Sinbad, who briefly returned to the show in 2006 while Mo'nique was on maternity leave.
Whoopi Goldberg became the new host for the 2006–2007 season.
At times, comedian and actor Anthony Anderson hosted during the 2006–2007 season. 
Season 1 Soundtrack is a compilation of soundtracks from the Showtime show "The L Word".
It features songs that were used as soundtracks from its first season.
It was released in 2004, the same year as the show's premiere.