Tetralogy is the science or...?

If you ask the dictionary or another source, we learn that the tetralogy is a work - literary, musical and cinematographic - of the four interconnected consecutive parts (gr. tetra - "four", logos - "word, story, narrative"). Most often the components of this product are produced or published independently of each other.
To make it more clear, just try from memory to recover some of this work.

Tetralogy to the cinema

the Most famous tetralogy - a film about adventures of Indiana Jones. Took place exciting the action on screen, so it projected remained in the memory of several generations.

<span>the Following example is a tetralogy, which I remember very well the older generation, "Resident" about the fate of agent Mikhail Tulyev in four parts: "blunder"<span> "</span>the fate of the resident"<span> "</span>the return of the resident"<span> "</span>End of operation "Resident". The films were characterized by the logical development of actions in the same way and with one main character.</span>
<span>For those who are younger, tetralogy is a series of "Shrek" or "toy Story".</span>
<span>If you ponder and reminisce all your favorite TV shows from early childhood, we can enumerate a long time. Great theme for playing with friends, for example. </span>

What is the tetralogy in literature

<span>we now Give literary examples. The most popular tetralogy is a story about vampires called "Twilight" by Stephenie Meyer. It appeared originally in several volumes, becoming the undisputed bestseller and then was filmed.</span>
<span>to the tetralogy can be counted in four successive books describing the adventures of Lemuel Gulliver. The title itself mentions that it consists of four parts - the number of journeys of the main character of the book. As it should be in works related to the tetralogy, there is a single author and a developing storyline.</span>

<span><span>Can also be attributed to the tetralogy of works by Victor Pelevin ("Chapaev and Emptiness", "Generation "P", "Number", "the Sacred book of the werewolf"), showing a single intention of the author and storyline.</span></span>

Tetralogy in music

<span><span>the music industry works, consisting of several parts, called "cyclical". </span></span>
<span><span>the Most striking example of the music of the tetralogy is a work of written by Richard Wagner in the period from 1848 to 1874.</span></span>
<span><span>Also, such cyclic works include some of the fugues, preludes. </span></span>
What else can be attributed to the definition of the tetralogy? The fact that each of the four parts is an integral segment of the main storyline, but at the same time independent solid piece.