Title: Gotham (season 4)
Content:  The season is set to be released on Blu-ray on August 21, 2018. On August 15, 2018, the season was made available on Netflix UK and Ireland one month prior to its Region 2 DVD release.
Title: Gotham (season 5)
Content:  The season premiered on January 3, 2019 on Fox in the United States, and ended on April 25, 2019. The season was released on DVD and Blu-ray on June 11, 2019.
Title: Gotham (season 3)
Content:  The season premiered on Fox on September 19, 2016 and concluded on June 5, 2017 with a two-hour season finale. The season had two breaks between episodes, with a continuous run between them. The first 11 episodes aired from September 19 to November 28, 2016; three episodes aired from January 16 to January 30, 2017; and the final 8 episodes aired from April 24 to June 5, 2017.
Title: Gotham (season 3)
Content:  New additions to the cast include Benedict Samuel as Jervis Tetch; and Maggie Geha as a grown Ivy Pepper, recasting the role portrayed by Clare Foley in previous seasons. The season was broadcast over three consecutive runs: the first 11 episodes aired from September to November 2016; the next three aired in January 2017; and the other eight episodes aired from April to June 2017. Like the previous season, the season also holds two subtitles. The first 14 episodes are subtitled Mad City while the other eight episodes are subtitled Heroes Rise. The season premiered on September 19, 2016 and concluded on June 5, 2017 with a two-hour finale on Fox.
Title: Gotham (season 4)
Content:  The season was originally set to air on September 28, 2017, on Fox in the United States. However, on July 28, 2017, Fox decided to move up the premiere to September 21, 2017 in order to give its companion newcomer series The Orville a continuous run. The fourth season is moving to a Thursday timeslot, alongside The Orville, after airing its past seasons on Mondays.
Title: Gotham (season 1)
Content:  The season was broadcast over two runs on Fox: the first 10 episodes aired from September to November 2014; and the other 12 episodes aired from February to May 2015. The season premiered on September 22, 2014, and concluded on May 4, 2015.
Title: Gotham (season 2)
Content:  cast include James Frain as Theo Galavan; Jessica Lucas as Tabitha Galavan; and Michael Chiklis as Captain Nathaniel Barnes. Also, Morena Baccarin, Chris Chalk, Drew Powell, and Nicholas D'Agosto were upped to series regulars after having recurred on the previous season. The season was broadcast over 2 runs: the first 11 episodes aired from September to November 2015; and the other 11 episodes aired from February to May 2016. The season also holds two subtitles. The first half of the season is subtitled Rise of the Villains while the second half is subtitled Wrath of the Villains. The season premiered on September 21, 2015 and concluded on May 23, 2016 on Fox.
Title: Gotham (season 4)
Content:  Alexander Siddig. The fourth season premiered on September 21, 2017, on Fox, while the second half premiered on March 1, 2018. The season concluded on May 17, 2018. The season received positive reviews from critics and audiences, who cited the character development, writing and action sequences as highlights of the season, with some calling it the best season yet. The premiere was watched by 3.21 million viewers with a 1.0 in the 18–49 demo, which was a 17% decline from the previous season premiere but on par with last season's average. Despite remaining with consistent ratings throughout the first half of the season, the second half experienced new series lows in the spring and being in danger of cancellation. Despite the ratings drop, Fox renewed the show for a fifth and final season on May 13, 2018.
Title: Gotham (TV series)
Content:  The pilot was screened at the Warner Bros. Television and DC Entertainment panel at San Diego Comic-Con International in July 2014. The series premiered on Nine Network in Australia on October 12. In Canada, it is shown in simulcast on CTV and reran on M3. In New Zealand, it premiered on TV2 on September 28. In the United Kingdom, it premiered on Channel 5 on October 13. The channel also screen the second season but after failing to screen the third season it was announced in August 2017 that the season would premiere exclusively on DVD and Blu-ray and be on Netflix from September 1. In Ireland, it premiered on RTÉ2 on January 26, 2015. In March 2018, it was announced that E4 had acquired the rights to air the fourth season on UK television. In September 2014, Warner Bros. sold the series' worldwide video on demand rights to Netflix. The 100th episode and series finale aired on April 25, 2019.
Title: Gotham (TV series)
Content:  was officially renewed by Fox for a 22-episode third season on March 16, 2016. In May 2017, Fox renewed the series for a fourth season, which premiered on September 21, 2017. On May 13, 2018, Fox renewed the series for a fifth and final season originally consisting of 10 episodes then later increased to 12. The season began production in July that year, and premiered on January 3, 2019. Fox Entertainment President David Madden said that the show's production team "have masterfully honored the mythology of Gotham and brought it to life with depth, emotion, and memorable high drama."

Question: when does the new gotham season come out?
Answer: September 21, 2017.
September 21, 2017.