The term 'series finale' refers to the last episode of a television series. The crossword solutions for this term are OMEGA (5 letters), ETCETERA (8 letters), ZEE (3 letters), ETC (3 letters), XYZ (3 letters), and ETAL (4 letters). These words are often used as placeholders in language, representing the last item in a list or sequence. OMEGA is the last letter of the Greek alphabet, while ETCETERA is a Latin phrase meaning 'and so on'. ZEE, ETC, and XYZ are all used to represent the end of a list, with ZEE being the last letter of the English alphabet and ETC and XYZ being used as a placeholder for an unknown number of items. Finally, ETAL is a Latin phrase meaning 'and others'.