dramatic event vs episode

dramatic event and episode both are nouns.

Word	Noun	Adjective	Verb	Adverb
dramatic event	Yes	No	No	No
episode	Yes	No	No	No

As nouns, episode is a hypernym of dramatic event; that is, episode is a word with a broader meaning than dramatic event:

dramatic event (noun)	episode (noun)
an episode that is turbulent or highly emotional	film consisting of a succession of related shots that develop a given subject in a movie
	a part of a broadcast serial
	a brief section of a literary or dramatic work that forms part of a connected series
	a happening that is distinctive in a series of related events