Noun
series finale (plural series finales)
The promotional or advertisement term used to describe the final episode of a television program, usually a situation comedy or a drama.
I think that 'The Shield' was a phenomenal series finale. Damon Lindelof
Power Series Finale Recap: Ghost's Murderer Is Finally Revealed! Source: Internet
Series Finale – Miles is forced to examine his lack of faith more than ever before when the God Account sends him his sister, Ali, as a friend suggestion on the eve of her cancer surgery. Source: Internet
Series Finale: Was the Emotional Swan Song a Fitting End? Source: Internet