episode (one instalment of a TV series, radio show, podcast, or other serial)
J'ai regardé le dernier épisode de la série hier soir.
I watched the latest episode of the series last night.
an incident, occurrence or bout (often used for a medical or behavioural episode, e.g. a bout of fever, an episode of violence)
Il a eu un épisode de fièvre ce matin.
He had a bout of fever this morning.