Is "series" plural or singular? [duplicate]
Series is singular and doesn’t change in the plural. Its spelling originates from Latin:
1610s, "a number or set of things of one kind arranged in a line," from Latin series "row, chain, series, sequence, succession".
(Etymonline)
"Series" can be singular or plural depending on context.
I like to watch TV series.
Uses series as a plural and means you like to watch a number of different TV shows.
I like to watch a TV series.
Uses series as singular and means you like to watch one TV show.