What is "zero hour"

n. The scheduled time for the start of some event, especially a military operation; H-hour

n. the time set for the start of an action or operation

Zero Hour may refer to:

• Midnight, or 00:00

"Zero Hour" is the twenty-fourth and final episode of the third season of the American science fiction television series Star Trek: Enterprise; the seventy-seventh episode overall. It first aired on May 26, 2003, on the UPN network within the United States. Set in the 22nd century, the series follows the adventures of the first Starfleet starship, Enterprise, registration NX-01. Season three of Enterprise features an ongoing story following an attack on Earth by previously unknown aliens called the Xindi.

In this episode, Sub-Commander T'Pol leads the Enterprise on an attack on 'Sphere 41' in an attempt to destroy the sphere network within the Delphic Expanse. Meanwhile, a team led by Captain Jonathan Archer has infiltrated the Xindi weapon while it is en route to Earth. Both the spheres and the weapon are destroyed, but Archer is lost, presumed dead. Enterprise returns to Earth but the crew suddenly find that they have been sent back in time to a very different Second World War.

The episode was written by series co-creators Rick Berman and Brannon Braga and was directed by Allan Kroeker. The episode took eight days to film and included a larger guest cast than normal for episodes of Enterprise, as well as two competition winners. The twist at the end of "Zero Hour" was originally conceived by the writers as a joke, but was developed over the course of the third season to become the concept of "alien Nazis". This twist was further explained and resolved in the season four two-part opener "Storm Front". Roughly 3.91 million viewers watched "Zero Hour" on first broadcast.

Zero Hour is a Canadian/ British documentary-style television series, which aired on The History Channel in the United States, History Television in Canada, and on the BBC in the United Kingdom. Zero Hour has also aired on Channel Seven in Australia (third series aired on Network Ten from May 1, 2010 and now plays on 7mate); on Discovery Channel in Africa, Asia, New Zealand, Brazil, and the Netherlands. The program focuses on retelling the details of tragic man-made disasters which each unfolded in less than an hour.

Certain episodes have been partially censored for particular broadcasts. One example is the Columbine High School massacre episode, which had some scenes cut (for intense violence, profanity, and racist slurs) when broadcast on Discovery Channel.

From September 1, 2014 to March 1, 2016, all episodes were available for streaming on Netflix.

"Zero Hour" is the fourth episode from Season 8 of the military science fiction television series Stargate SG-1. It was written by producer Robert C. Cooper and directed by Peter Woeste. Clips of the episode were shown on Late Night with Conan O'Brien before Season 8 began, with Late Night graphic designer Pierre Bernard making a cameo appearance in the episode. The first airing of "Zero Hour" on July 30, 2004 on the American Sci Fi Channel was viewed by 3 million Americans. The episode received mixed reviews.

"Zero Hour" takes place shortly after the promotion of main character Jack O'Neill from Colonel to Brigadier General. With O'Neill being the new leader of Stargate Command (SGC), Lt. Col. Samantha Carter has assumed O'Neill's old position as leader of the SG-1 unit. The idea to have the episode focus on General O'Neill solving various problems at his new job came from the writers' wondering what the general of the SGC does while his teams are on missions.

Zero Hour is Zero Hour's first album. Released in 1999, it was limited to 2100 copies.

Zero Hour is a live album by the Avengers. It was released on vinyl in 2003 on the Italian label DBK Works. The album features a recording of a concert that took place at the Old Waldorf, San Francisco, CA on June 13, 1979, one of the band's final concerts. The same concert was released a year later on the compilation album The American in Me.

Zero Hour (originally published as Fahnenjunker Volkenborn) is an autobiographical war novel by German author Georg Grabenhorst. The book was initially published in Leipzig Germany in 1928 and was translated into English the following year. Zero Hour was later re-published by the University of South Carolina Press in 2006, with an introduction by Robert Cowley.

The book has been compared to All Quiet on the Western Front.

Zero Hour is a 22-minute 1944 Canadian documentary film, made by the National Film Board of Canada (NFB) as part of both the wartime Canada Carries On and The World in Action series. The film was produced by Stuart Legg. Zero Hour describes the Axis and Allied invasions that have taken place during the Second World War.

Zero Hour was a progressive metal band formed by twin brothers Jasun Tipton and Troy Tipton in Pleasanton, California in 1993. The band is signed by Sensory Label. New vocalist Chris Salinas joined the band for their 2006 album Specs of Pictures Burnt Beyond, replacing Fred Marshall. Salinas had previously fronted another progressive metal outfit, Power of Omens, which disbanded in 2005 after two albums.

The band has since disbanded due to Troy Tipton's arm injury. Jasun Tipton stated "...he had the surgery and has been working hard to get back into playing shape. He’ll never be perfect but he’s gaining some strength in his arm and pushing forward. Much of the Zero Hour material Troy played with a lot of left hand strength. In Zero Hour there’s a lot of tapping and legato bass line in the material. Troy can’t and will not put his arm through those problems again as he still has issues." Jasun & Troy are now focusing on two new projects: the instrumental act Abnormal Thought Patterns and the vocally-driven Cynthesis

Zero Hour is a 2006 one-person play written and performed by playwright and actor Jim Brochu and directed by actress Piper Laurie. In a biographical reflection on Zero Mostel, Brochu portrays the Jewish actor and comedian giving a fictional interview with an unseen New York Times reporter shortly before Mostel's death in 1977. Brochu's Mostel recounts his life and career; he describes the impact of the Hollywood blacklist on himself and his friends, including his testimony before the House Un-American Activities Committee, as well as his success with A Funny Thing Happened on the Way to the Forum, Fiddler on the Roof and the original movie version of The Producers.

A lifelong admirer of Mostel, Brochu found inspiration during his research into the adversity Mostel faced, including his parents' rejection of his marriage to a Catholic woman and a bus accident that resulted in a severe leg injury, and how his "sense of humor saved him". Writing the play during intermissions of another show he was working on, Brochu also drew upon his own recollections of Mostel, including seeing the actor in Forum and visiting him backstage:

I went down and Zero was outside of his dressing room reading the Riot Act to one of the other actors. The actor had upstaged him or done something. He was screaming at this actor and finished with, Now never do it again! The actor walked away and he looked at me and said, Well, hello!. How are you? Come visit me.

After seeing the play, Mostel contemporary Theodore Bikel wrote to Brochu, "Thank you for bringing back a volcano that we thought was long extinct."

The play premiered at the Egyptian Arena Theatre in Hollywood, California, presented by the West Coast Jewish Theatre and directed by Paul Kreppel. It won the 2006 Ovation Award for "World Premiere Play." It began a limited Off Broadway run at St. Clement's Theatre beginning November 14, 2009, officially December 22, and running through January 31, 2010. Bochu won the 2010 Drama Desk Award for Outstanding Solo Performance.

Zero Hour (stylized as ZERØ HØUR) is an American conspiracy television series that aired on ABC from February 14 to August 3, 2013. The series was created by Paul Scheuring and starred Anthony Edwards. Zero Hour originally aired Thursdays at 8:00 pm Eastern and 7:00 pm Central as a midseason replacement. However, in the U.S., the pilot episode became available on Hulu Plus . On March 1, 2013, the series was canceled and removed from its airing schedule by ABC due to low ratings. On April 26, 2013, it was announced that the remaining episodes will begin airing June 15, 2013, with two back-to-back episodes.

Zero Hour was aired in Canada on the Global Television Network until ABC canceled it but returned to the schedule in the summer after original episodes air on ABC. Zero Hour is also airing via the Fox network in Italy, Spain and the Danish Broadcasting Corporation. Zero Hour was announced in 2012 as due to air in Australia on the Seven Network in 2013, but did not premiere until July 13, 2015 at a late night timeslot of 11:30pm.

Zero Hour is a 1977 West German drama film directed by Edgar Reitz, starring Kai Taschner and Anette Jünger. The narrative is set in the summer of 1945 in a small village outside Leipzig, where the Americans have just pulled back and been replaced by Soviet troops. The film follows the inhabitants as they adjust to the new situation, in particular Joschi, a teenage Hitler Youth member who is fascinated by the Americans.

The film was produced through Edgar Reitz Filmproduktions in collaboration with Bernd Eichinger's Solaris Film- und Fernsehproduktion and Westdeutscher Rundfunk. It was released in theatres on 6 February 1977 and broadcast on West 3 on 8 March the same year.