From The Art and Popular Culture Encyclopedia
A story arc is an extended or continuing storyline in episodic storytelling media such as television, comic books, comic strips, boardgames, video games, and in some cases, films. On a television program, for example, the story would unfold over many episodes. In television, the use of the story arc is much more common in dramas than in comedies, especially in soap operas. Webcomics are more likely to use story arcs than newspaper comics, as most web comics have readable archives online that a newcomer to the strip can read in order to understand what is going on. Although story arcs have existed for decades, the term "story arc" was coined in 1988 in relation to the television series Wiseguy , and was quickly adapted for other uses.
Many American comic book series are now written in four or six-issue arcs, within a continuing series. Short story arcs are easier to package as trade paperbacks for resale, and more accessible to the casual reader than the never-ending continuity that once characterised comics.
Dramatic structure and purpose
The purpose of a story arc is to move a character or a situation from one state to another; in other words, to effect change. This change or transformation often takes the form of either Aristotle's tragic fall from grace or a reversal of that pattern. One common form in which this reversal is found is a character going from a situation of weakness to one of strength. For example, a poor woman goes on adventures and in the end makes a fortune for herself, or a lonely man falls in love and marries.
Another form of storytelling that offers a change or transformation of character is that of "hero's journey," as laid out in Joseph Campbell's theory of the monomyth in his work, The Hero with a Thousand Faces. Christopher Vogler's The Writer's Journey: Mythic Structure for Writers details the same theory specifically for western storytelling.
Story arcs in contemporary drama often follow the pattern of bringing a character to a low point, removing the structures the character depends on, then forcing the character to find new strength without those structures.
Story arcs in television
Story arcs on television have existed for decades, and are common in many countries where multi-episode storylines are the norm (an example being the UK's Doctor Who), as well as most anime series.
Many arc-based series in past decades, such as V, were often short-lived and found it difficult to attract new viewers; they also rarely appear in traditional syndication. However, the rise of DVD retail of television series has worked in arc-based productions' favor as the standard season collection format allows the viewer to have easy access to the relevant episodes. One area of television where story arcs have always thrived, however, is in the realm of the soap opera, and often episodic series have been derisively referred to as "soap operas" when they have adopted story arcs.
Arc-based series draw and reward dedicated viewers, and fans of a particular show follow and discuss different story arcs independently from particular episodes. Story arcs are sometimes split into subarcs if deemed significant by fans, making it easy to refer to certain episodes if their production order titles are unknown. Episodes not relevant to story arcs are sometimes dismissed as filler by fans, but might be referred to as self-contained or stand-alone episodes by producers.
Story arc usage in manga and anime
Neon Genesis Evangelion, for example, is a single story arc spanning 26 episodes. Other longer anime have multiple story arcs, such as Bleach, Higurashi no Naku Koro ni, One Piece, and Fairy Tail. The anime Dragon Ball Z adapts four different story arcs from the Dragon Ball manga, each with its own ultimate antagonist, along with original story arcs created for the TV series.
Manga and anime are usually good examples of arc-based stories, to the point that most series shorter than 26 chapters are a single arc spanning all the chapters. This makes syndication difficult, as episodes watched in isolation often end up confusing viewers unless watched in conjunction with the series as a whole. Series of 30 chapters or longer usually have multiple arcs.