Definitions of episodic:

• adjective:   limited in duration to a single episode

  Example: "An account concerned primarily with episodic events such as the succession of rulers"

• adjective:   occurring or appearing at usually irregular intervals

  Example: "Episodic in his affections"

• adjective:   of writing or narration; divided into or composed of episodes

  Example: "The book is episodic and the incidents don't always hang together"