In episodic television, a bottle episode is produced cheaply and restricted in scope to use as few non-regular cast members, effects and sets as possible. Bottle episodes are usually shot on sets built for other episodes, frequently the main interior sets for a series and consist largely of dialogue and scenes for which no special preparations are needed. They are also commonly used when one script has fallen through and another has to be written at short notice.
The etymology of the phrase originates with a similar term used on the set of the 1960s Star Trek. Cast and crew members of the show use the phrase "ship-in-a-bottle episodes", for those that took place only on board the Starship Enterprise.
Bottle episodes are sometimes produced when a show has a mid-season cliffhanger or an expensive season opener/closer, to allow as much of the budget as possible to go to the more expensive episodes. Scott Brazil, executive producer/director of The Shield, described bottle episodes as "the sad little stepchild whose allowance is docked in order to buy big brother a new pair of sneaks". The popularity of the Friends bottle episode "The One Where No One's Ready" led the producers to create at least one bottle episode in each season. Several early episodes of The X-Files were conceived as bottle episodes, including "Space", "Darkness Falls", and the well-received "Ice", although these ran over budget.
Bottle episodes from Star Trek are known for occasionally becoming popular with fans. Examples include "The Tholian Web", "Journey to Babel" and "Balance of Terror". The phenomenon has persisted to a lesser extent in later incarnations, with "Duet" (Star Trek: Deep Space Nine) being celebrated by Startrek.com and Amazon.com—among other sources—as "[a]rguably one of the best episodes of Deep Space Nine and a jewel in the entire Trek canon".
Although Star Trek cast coined the term "bottle episode", it was not the first show, science fiction or otherwise, to use them. The third story of Doctor Who, "The Edge of Destruction", was a bottle episode created in different circumstances to most, as the previous two stories had been eleven episodes between them and as the series had not been formally picked up by the BBC, a two part story was needed and no budget had been assigned. It only featured the four main cast. Doctor Who has had several more bottle episodes since then, most notably, "Amy's Choice". Although some scenes were filmed on location, within the narrative of the show, the episode takes place within the TARDIS.
On Breaking Bad, the third-season" episode "Fly" features only two members of the main cast (plus a few extras) and takes place almost exclusively in the secret laboratory used to cook crystal methamphetamine. Series creator Vince Gilligan has referred to this as a bottle episode, noting that the limited setting and cast allowed for a slower pace and deeper exploration of character traits and motives,
Even if financial realities didn't enter into it, I feel as a showrunner that there should be a certain shape and pace to each season, and the really high highs that you try to get to at the end of a season—the big dramatic moments of action and violence, the big operatic moments you're striving for—I don't think would land as hard if you didn't have the moments of quiet that came before them. The quiet episodes make the tenser, more dramatic episodes pop even more than they usually would just by their contrast.Vince Gilligan
In Penny Dreadful Season 3, Episode 4, Vanessa Ives and John Clare share the padded white room at a Victorian insane asylum for nearly the entire episode, breaking away for brief scenes with Dr. Seward in her office, as well as Seward briefly appearing in the padded room at the Banning asylum. The episode takes place as a hypnotic recollection. Rory Kinnear, the actor playing Clare, also plays two other characters. There are brief but key special effects. Miranda's Season 2, Episode 5, "Just Act Normal", takes place entirely in a therapist's office and consists of only three main characters, one of whom makes a cameo at the end and two guest stars. Grey's Anatomy's 250th episode, "Guess Who's Coming to Dinner", features several members of the main cast, three guest stars and takes place mostly in Meredith Grey's home during a dinner party.
Another example is Seinfeld's Season 2, Episode 11 "The Chinese Restaurant", which takes place almost entirely in the waiting room of a restaurant. Archer's Season 6, Episode 5, "Vision Quest", features seven of the eight major cast members stuck in an elevator in real time.
Family Guy's Season 8, Episode 17, "Brian & Stewie", takes place almost entirely inside a bank vault, with just two animated characters (Brian, the anthropomorphic dog, and Stewie, a troubled and intelligent baby) there for an entire weekend. The episode begins with Brian and Stewie introducing the special story and ends with a few special re-run musical numbers. This was a bottle episode not for budgeting reasons, but as an experiment with both the two characters' relationship and the viewing audience. The audience was receptive of the special episode and seemed to enjoy another step in the development of the characters' friendship.
The Season 1 finale of Married... with Children, "Johnny Be Gone", takes place entirely in the Bundys' living room, as Al and Peg unsuccessfully attempt to leave for the "going out of business" party of their favorite burger joint, where they first met.
The comedy-drama series Leverage had three bottle episodes. "The Bottle Job," from Season 2, is confined to Nathan Ford's (Timothy Hutton) apartment; McRory's, the bar it sits over; and the bar's back room. It alludes to the concept by forcing the Leverage team to execute a late betting scam, which normally takes days or weeks just to set up, in only an hour and a half; Ford explicitly calls it "the Wire in a bottle." (Ford, a recovering alcoholic, also reverts to drinking as part of the scam; "hitting the bottle" is an expression for heavy drinking.) In Season 4's "The Cross My Heart Job," the team is stuck at an airport without access to any of their usual equipment, funds, or cover identities, and is tasked with stealing a transplant heart for a 15-year-old boy. "The Broken Wing Job" focuses on Parker (Beth Riesgraf) foiling a kidnapping while she recuperates from a broken leg and the rest of the team is in Japan on an assignment.
The drama series Supernatural had in season 11 a bottle episode, titled "Baby", in which the entire episode takes place inside the Impala, the car they ride since the first episode in season 1. However, unlike other bottle episodes, the characters do leave the car on multiple occasions. The camera itself, however, remains within the car throughout the entirety of the episode.
A meta-example is Community's Season 2, Episode 8, "Cooperative Calligraphy". After the opening, characters Jeff Winger (Joel McHale) and Abed Nadir (Danny Pudi) both refer to the situation as a bottle episode. The entire episode is set inside the college library with only the main cast. Another meta-example is Teen Titans Go!'s Season 3, Episode 29, "Bottle Episode". Its plot centers around the main characters being trapped in a literal glass bottle, and passing the time by reminiscing about previous episodes. The episode breaks the fourth wall multiple times with dialogue referencing the expense of television production, giving production staff a break, and the need to fill episodes that fall through.
There are also series of bottle episodes, such as Blackadder II. After the previous series, The Black Adder, proved to be more expensive than the BBC wanted, to get the second series commissioned the writers Richard Curtis and Ben Elton arranged to cut every single expensive scene and to make the cheapest series possible. Another earlier BBC series that similarly consists almost entirely of bottle episodes is Steptoe and Son.
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