TV Ratings: 'Parenthood' Series Finale Swells, 'Scandal' Jumps in Return

'The Big Bang Theory' tops the night in its steady-ish move back to the schedule, as the Fox line-up slides against increased competition.

Thursday saw the return of ABC's Shonda Rhimes block — and TGIT was just as strong as it was in the fall. With an average 3.6 rating among adults 18-49, Scandal topped the lineup with a solid half-of-a-point jump from its last original in October.

Elsewhere, Grey's Anatomy (2.7 adults) improved three-tenths of a point and How to Get Away With Murder (3.0 adults) returned steady.

Read more 'Parenthood' Showrunner Jason Katims Pens Emotional Farewell to Show (Guest Column)

CBS saw The Big Bang Theory (4.4 adults) dominate the night in its return, off just two-tenths of a point from its last original at the top of the year. Mom (2.8 adults) was improved four-tenths of a point with the stronger lead-in, though Two and a Half Men (2.3 adults) and The McCarthys (1.6 adults) saw no noticeable change. Elementary (1.3 adults) lost two-tenths of a point from last week.

All of the new competition meant hits for American Idol. The Thursday outing fell six-tenths of a point to a 2.2 rating in the key demo. Backstrom (1.4 adults), facing Scandal, was hit hardest. It dropped half of a point from its OK series premiere last week.

NBC said goodbye to Parenthood at 10 p.m., and the series fetched a 1.7 rating among adults 18-49 and 5.5 million viewers for its swan song. That marked its biggest showings in over two years on both counts. Lead-in The Biggest Loser (1.4 adults) also improved, up two-tenths.

The Vampire Diaries (0.7 adults) and Reign (0.4 adults) were mostly steady on the CW.

Read more Shonda Rhimes Opens Up About 'Angry Black Woman' Flap, Messy 'Grey's Anatomy' Chapter and the 'Scandal' Impact