Some viewers believed Claire Danes portrayal of a Bipolar Sufferer was too realistic to be acting and wrote to the Broadcaster suggesting that she be given time off.

To prepare for her role in the series, Claire Danes met with CIA officers. She also watched videos made by people with bipolar disorder and consulted with author Julie Fast who suffers from the same disorder.

Carrie's name was originally intended to be Claire. It was changed to Carrie when Claire Danes accepted the role.

Some of the photographs that are interspersed over the course of the opening credits sequence are actual pictures of Claire Danes as a young girl.

Season 4 was shot entirely on location in South Africa. According to director/producer Lesli Linka Glatter, the hardest part was find neighborhoods that would resemble American suburbia for the few scenes that took place around Carrie's sister house.

Damian Lewis landed the lead role without an audition. Producers Howard Gordon and Alex Gansa were so impressed with his performance in the under-rated Keane (2004), they offered him the part over the course of a phone call.

In a December 2012 New York Times interview, Howard Gordon explained why Jessica calls her husband "Brody," his last name, instead of his first name, "Nicholas," or a nickname: "It's something that's been in their relationship from the very beginning and speaks to the love between them. We've heard from many military families, and it's not that uncommon a practice."

Navid Negahban, who plays Abu Nazir, was discovered by the show's producers at a public reading of Iranian poetry.

Ben Affleck was asked to direct the pilot and wanted to do so, but his arrangement with his wife Jennifer Garner (in which when one worked the other would stay at home with the kids) prevented him to take the job.

Morena Baccarin said in an interview that she and Claire Danes attended the same Junior High school, and were even in the same homeroom for much of that time.

Claire Danes stated in an interview that writer Meredith Stiehm was deeply involved in writing the character of Carrie, not only because Stiehm was the only female writer on the show but also because her sister suffers from Bipolar Disorder.

Claire Danes has won 2 Golden Globes for her performance on this show.

Although Carrie's condition was not specified during the show's first few episodes, Claire Danes, who considered majoring in psychology at Yale, told "Entertainment Weekly" that she decided that Carrie has Bipolar 1.

Barack Obama's favorite TV-show. He liked the series so much he ordered the DVD box set.

Carrie wasn't originally written to have bipolar disorder in the first draft of the script. Her disorder was added after Claire Danes was cast and by expressed desire of Showtime.

"Season 5" made history for being the first U.S. TV series to shoot an entire season in Berlin, Germany.

Damian Lewis was invited to the White House as a guest of President Barack Obama. In an interview with talk show host Graham Norton, Damian admitted that he and his wife took a selfie in the bathroom.

During the introductory montage sequence, archival excerpts of five US Presidents' voices are heard in chronological order: Ronald Reagan (40), George Bush (41), Bill Clinton (42), George W. Bush (43) and Barack Obama (44). Except for George W. Bush, video clips of the other four Presidents are shown during the intro. Louis Armstrong and Colin Powell are also excerpted.

In a New York Times interview, Alex Gansa said that the season 2 production budget had a line item to digitally erase Claire Danes's pregnant midriff in some shots.

Halle Berry was originally offered the role of Carrie.

On some occasions, Morena Baccarin had to wear a wig for her role as Jessica while she waited for her cropped hairdo as Anna in V (2009) to grow out.

The American series is based on an Israeli drama series Prisoners of War (2009) (Hebrew for 'Abducted' or 'Kidnapped'). Gideon Raff created the original series in response to the many Israeli soldiers who had been enemy captives and their brutally difficult, and largely unreported, efforts to reintegrate into Israeli society after they returned home. One of the major differences between the Israeli and American series is that Brody was apparently rescued in Homeland, while in Hatufim the POWs were traded.

Intelligence Agencies have policies to strongly discourage applications from people with a Mental Illness diagnosis.

Graffiti artists employed to create slogans for a refugee camp in Season 5 actually wrote anti-Homeland slogans such as "Homeland is a joke, and it didn't make us laugh" on the set in protest at the show's portrayal of Muslims. The show's creator Alex Ganza commented that Homeland always strives to be subversive in its own right and a stimulus for conversation and that he couldn't help but admire this act of artistic sabotage.

Laura Fraser originally played Jessica Brody in the pilot but was replaced by Morena Baccarin before the first airing.

For some of his more physical scenes, Rupert Friend (Quinn) underwent training in Krav Maga, a highly effective Israeli military system of self-defense.

Chris Chalk (Tom Walker) appeared in an episode of Law & Order (1990) (season 14) as a character called Tom Walker.

The sixth season was filmed in the run-up to the 2016 Presidential election between Donald Trump and Hillary Clinton. The producers were predicting a victory for Clinton, so Elizabeth Marvel was cast as the President-elect to parallel current events. When Trump unexpectedly won the election, creator Alex Gansa chose not to re-shoot, as the series is ultimately a work of fiction. Given the storyline (a new president, a transfer of power), the season premiered three months later than usual (in January), placing it directly between the actual election and inauguration.

Commencing with Season 6 / Episode 2, the pre-credits sequence opens with uncredited audio commentary by poet Gil Scott-Heron ("The first revolution is when you change your mind about how you look at things ..."), journalist Jeremy Scahill ("The brutality against protesters, the para-militarization of law enforcement..."), journalist Glenn Greenwald ("... the system of indefinite detention ..."), Jason Chaffetz (R-UT), Inspector General of the Intelligence Community Charles McCullough, etc.

Makram Khoury who plays Samir Khalil, was on the original Israeli homeland series Prisoners of War (2009)

In season 3, Claire Danes's character asks an FBI agent sarcastically: "You know how Romeo and Juliet ends right?". Claire Daines was cast as Juliet in Baz Lurhman's version of Romeo+Juliet alongside Leonardo DiCaprio.

Joan Allen was offered a role on season 4. She turned it down because they were shooting in South Africa, and Allen didn't want to miss her daughter's first year of college.

Morena Baccarin and Damian Lewis's characters are supposed to be the same age. In real life, Lewis is 8 years older than Baccarin.

Diego Klattenhoff (Mike Faber), Amir Arison (Prince Farid), and Jason Warner Butler (Paul Franklin), were all on The Blacklist (2013).

The eccentric character Brett O'Keefe (Jake Weber) is apparently inspired by talk show host and conspiracy theorist Alex Jones of Infowars TV and radio based in Austin, Texas.

Mandy Patinkin was nominated for the 2018 Emmy Award in the Supporting Actor in a Drama Series category for his role as Saul Berenson in Homeland (2011), but lost to Peter Dinklage from Game of Thrones (2011).

The character of Brett O'Keefe (played by Jake Weber) was originally going to appear in the second half of season 6, but when his story-line proved to be timely with the Donald Trump administration, a few scenes extra were shot to edit him into episode 2, so his presence would be known sooner.

In the pilot episode when SGT Brody is at Andrews AFB, the military turboprop aircraft in the background is and OV-1D Mohawk U.S. Army surveillance aircraft. They were last operational in 1996.

Kyle Chandler turned down the role of Brody.

Homeland Security was started by George W. Bush.

Elizabeth Marvel, who portrays President Elizabeth Keane here, is an alumni player on almost all of the Dick Wolfe based productions shows, including the Law and Order franchise. Linus Roache, who plays Chief of Staff David Wellington, worked with Elizabeth on two separate occasions, on L.&O. in 2008 and 09.

This series was not the first joint venture for Mandy Patinkin and F. Murray Abraham as both had co-starred over 30 years earlier in The Big Fix (1978).

Actor Mandy Patinkin has been called out numerous times about the content of the series. Due to mentally damaging reasons he left Criminal Minds during it's third season. Others called him out due to Homeland being just as violent as Criminal Minds.

In Season 4 when Carrie was in the US she had an old model 2010 or earlier Jeep Compass in her driveway or whenever she was parked. When she drove she was shown in a very different looking new model Jeep Compass.

Brody was going to die on season 1 with the bomb-vest device, but Showtime encouraged Alex Gansa and Howard Gordon to keep the character alive as much as they could, which ended up being three seasons.

In S03E01 there is a note scribbled on a note pad that reads "you killed my son, prepare to die" which is a play on the quote "you killed my father, prepare to die" spoken by Iñigo Montoya in The Princess Bride (1987). Mandy Patinkin who played the role of Montoya also plays Saul Berenson in Homeland.

In season 4 the main antagonist Haqqani has the same name as a fairly prominent terrorist group in Iraq and Afghanistan named the Haqqani network.

Mandy Patinkin (Saul) and Victoria Clark (Ellen Mathison), who both play parental figures for Carrie (Saul is her mentor and surrogate father, and Ellen is her actual mother) were both members of the original Broadway cast of the musical Sunday in the Park with George--Clark as an understudy; Patinkin as the eponymous lead character Georges Seurat.