Ratings Rundown: 'NCIS: Origins' Hits Series High With Crossover, '9-1-1: Nashville' Slips

'NCIS: Origins' soared to an all-time high with Mark Harmon's visit. Let's boil down Nielsen's latest weekly breakdown.

Ratings Rundown: 'NCIS: Origins' Hits Series High With Crossover, '9-1-1: Nashville' Slips
Mark Harmon on 'NCIS: Origins' (CBS)

Nielsen's latest weekly ratings report brings good news for two spinoffs, but bad news for a third.