The term 'Series Units' refers to the individual parts that make up a television series. These units are usually referred to as episodes, which is an 8-letter word that can be used to solve the crossword. An episode is a single installment of a television show, and they are typically grouped together in a season. A season is a set of episodes that are released at the same time, usually over the course of several months. Each episode contains its own story arc and characters, and they are usually connected in some way to the overall plot of the series.