Story arc

A story arc is a term in episodic storytelling media such as television, comic books and comic strips that refers to a continuing storyline. In a television series, 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. Web comics 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's going on.

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 often called filler.

Many American superhero comics 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 characterized comics.

Although story arcs on television have been around for decades, and are common in many countries where multi-episode storylines are the norm (an example being Britain's Doctor Who), their use in American episodic series (as opposed to mini-series) has been sporadic, in part because of the belief that arc-heavy series are difficult to sell in syndication where stations might not air episodes in order, or casual/occasional viewers might lose interest. Many arc-based series in past decades, such as V (TV series) were often short-lived and found it difficult to attract new viewers; they also rarely appear in traditional syndication. One area of American television where story arcs have always thrived, however, is in the realm of the soap opera, and often episodic series have been derivatively referred to as "soap operas" when they have adopted story arcs.

In recent years, however, American viewers have become more accepting of story arcs, with arc-based series such as Alias (TV series) and 24 (TV series) finding critical acclaim and ratings success, and the release of arc-heavy TV series on DVD generating huge sales. The tide has turned to the point where arcs have become expected elements of dramatic series, and shows that rely upon standalone episodes are now quite often held up for criticism (a good example being Star Trek: Enterprise which enjoyed fan and critical acceptance only after adopting an arc format after two seasons of standalone episodes).