After rebounding last week, Mark Burnett’s new reality series for ABC Expedition: Impossible (1.4/4) slipped again, down 13%. Meanwhile, its lead-in, Wipeout (1.9/7), and lead-out, Rookie Blue (1.3/4), were both even with last week. Fox’s So You Think You Can Dance result show (1.6/6) was down 6% and followed by a Glee rerun. CBS’ Big Brother (2.7/8, 7.3 million) at 9 PM was up a tenth from last week to once again rank as the top program of the night and lead CBS (1.8/6, 6.3 million) to a nightly victory despite featuring reruns in two of the three hours of primetime. NBC aired all repeats.