Friday TV Ratings 12/18/20: Shrek the Halls and Olaf’s Frozen Adventure Perform Decently, MacGyver Steady, College Football Leads (UPDATED)

Preliminary Analysis: 'Shark Tank' took the night off on ABC, replaced by Christmas specials 'Olaf's Frozen Adventure' (0.5) and 'Shrek the Halls' (0.5). 'Olaf' matched what it garnered when it aired last month (0.5) while 'Shrek' was two-tenths below last year (0.7). A steady edition of '20/20' (0.4) closed out the alphabet network's evening. CBS's 'MacGyver' (0.4) inched down to a new series low but 'Magnum PI' (0.5) and 'Blue Bloods' (0.5) clung to last week's numbers. Fox won the night altogether with 'College Football' (0.7). NBC offered up a repeat of 'Weakest Link' (0.4) and a low-rated 'Dateline' (0.3). The CW had a double-pump of 'The Christmas Caroler Challenge' (0.1/0.1).

Finals Update: 'PAC-12 Champsionship' (+0.2), 'MacGyver' (+0.1), and the repeat of 'Dateline NBC' (+0.1) adjusted up.

Time	Show	18-49 Rating/Share	Viewers (mil)	Channel
8 PM	PAC-12 Championship	0.9/7	3.85	Fox
	MacGyver	0.5/3	4.72	CBS
	Olaf's Frozen Adventure	0.5/4	3.03	ABC
	Weakest Link (R)	0.4/3	2.48	NBC
	The Christmas Caroler Challenge	0.1/1	0.48	The CW
8:30 PM	Shrek the Halls	0.5/3	2.64	ABC
9 PM	Magnum PI	0.5/3	5.48	CBS
	Dateline NBC (R)	0.4/3	2.99	NBC
	20/20	0.4/3	2.53	ABC
	The Christmas Caroler Challenge	0.1/0	0.48	The CW
10 PM	Blue Bloods	0.5/4	6.38	CBS