Whether it is viewer fatigue in the homestretch of a long broadcast season or just the onset of warm weather, TV usage levels continue to drop and with them TV ratings too. Last night’s highest-rated program was Fox’s American Idol (3.9/13 in adults 18-49), which was down 7% from last Thursday’s fast national. It currently matches a series low but will likely be adjusted up in the final. Touch (2.1/6) was down 9% to a new series low. Fox (3.0/9, 11 million) still won the night in 18-49 and total viewers.

ABC’s Missing (1.3/4) slipped a tenth from last week for a new low. But veteran Grey’s Anatomy (3.2/9) perked up, up 10% from last week. At 10 PM, rookie Scandal (2.1/6) was steady, even with its fast national from last week and up a tenth from the final. Veteran comedy Rules Of Engagement (2.2/7), the only original on CBS last night, was down 19% from last week when it also followed a Big Bang Theory repeat.

NBC’s Community (1.3/5) was down a tenth from last week to tie its series low. At 8:30 PM, 30 Rock (1.5/5) was the only other series besides Grey’s in positive territory last night, up a tenth from last week. The Office (2.2/6) was up a tenth from the fast national, flat with the final. In its new (for this season) 9:30 PM tile slot, Parks And Recreation (1.8/5) picked up where it left off before its six-week hiatus, matching its rating for its most recent original in the 8:30 PM slot. At 10 PM, Awake (0.8/2) was down 11% from last week to a new series low. The CW’s dramas also hit lows: The Vampire Diaries (1.0/3) was down 17% and The Secret Circle (0.5/1) down 17%.