The sharks were back last night, but they had bit less bite than two weeks ago. ABC’s Shark Tank (1.9/7) was still the highest-rated and second-most watched show of night, but the entrepreneur reality series took a 14% fall among adults 18-49 from the season high of its last original on February 20. Then again that show was on at 9 PM, and last night the coconut-pounding Mark Cuban and the gang were shifted to 8 PM as a lead-in to the network’s tease debut of In An Instant (0.9/3). The Shark Tank shift actually gave ABC its best numbers in the 8 PM slot since November 2, 2012. Slot rivals World’s Funniest Fails (0.8/3, Fox), The Amazing Race (1.2/5, CBS) and Hart Of Dixie (0.4/2, The CW) were respectively even, up 9% and even with last week.

At least for this week, ABC mixed things up a bit so it could give its new tales-of-survival series a few more potential eyeballs on a 138688_01PLANEFriday. After its two-hour debut last night, In An Instant starts in its regular Saturday night slot tonight at 9 PM. Comparisons are a little stretched because of the nature of the re-creation-heavy series that’s mixed with real-life interviews and the fact that its time on Friday is also fleeting. Still, with a total viewership of 4.6 million, In An Instant was third in its initial time slot both demo and audience-wise ahead of Glee (0.6/2). The Fox show was even with last week among the key demo and had 1.8 million total viewers. The new ABC show saw a 52% drop in the 18-49s from its Shark Tank lead-in last night and was down 31% from what a new 20/20 did on February 27.

Which is why CBS broke ABC’s eight-week demo winning streak with a 1.3/5 rating to the Disney-owned net’s 1.2/4 on Friday. As is common on Occupational HazardsFridays, CBS also took the most-watched network position with 9 million tuning in last night. Obviously the night started off well with The Amazing Race’s small rise over last week, but it comparatively stalled after that. Hawaii Five-O (1.2/4) was even with last week, while viewership of blockbuster Blue Bloods (1.4/5) saw a 7% slip from the demo season high of its last original of February 20. The Tom Selleck-led series easily won the race for the night’s most watched show with 11.2 million viewers – though that too was down from two weeks ago, by a blink-and-you’d-miss-it 3%.

NBC’s only original of last night was a two-hour Dateline (1.3/5) that was up 8% from last week.