'episode' originates from Greek, specifically the word 'epeisodion,' where 'epi-' meant 'upon' and 'eisodos' meant 'entrance.'

'epeisodion' transformed into the Latin word 'episodium,' and eventually became the modern English word 'episode' through Middle English.

Initially, it meant 'a part of a play or story,' but over time it evolved into its current meaning of 'a distinct part of a series or event.'