Reviews behind series finale (2,2)
I believe the answer is:
et al
'series finale' is the definition.
(I've seen this in another clue)
'reviews behind' is the wordplay.
'reviews' says the letters should be written backwards (view the letters another way).
'behind' becomes 'late' (as in behind schedule).
'late' in reverse letter order is 'ET AL'.
(Other definitions for et al that I've seen before include "... and other people (or things) (abbr)" , "And others (abbrev.)" , "Latin abbreviation meaning 'and others'" , "'And others, to the old Romans (2,2)'" , "And others (abbr)" .)