( Interesting question. And you know, people who only know her from today may think it an odd fit, but back in the day I bet Betty White could have fit in perfectly on DS with the right role.)
"NBC also confirms that upon conclusion of Blindspot‘s fall run on Friday, Dec. 7, Midnight, Texas will shift to Fridays at 8/7c beginning Dec. 14 (leading into Dateline NBC’s two-hour block)."