noun
episode
EP-ih-sohd/ˈepɪsəʊd/
A distinct occurrence or segment in a longer sequence.
Watering the seedling is one episode in the man's continuing gardening work.

Etymology
The pieces describe something 'coming in besides': an addition between choral songs in Greek tragedy. Through the sense of an incidental narrative within a larger story, episode came to mean a distinct event or installment.
In context
the 1963 episode of The Twilight Zone called nightmare at 20,000 feet where William Shatner is in a plane and sees a gremlin through his window
More examples
- We watched three episodes after dinner.
- She recalls that argument as a painful episode in their friendship.
- He reports brief episodes of dizziness during exercise.
Forms
episode · episodes
episodic adjective — Occurring in separate events or installments.
Similar words
- installment
- Emphasizes one part of a work released in stages.
- incident
- Emphasizes an individual event rather than a continuing story's segment.