Monica Culpepper and Aras Baskauskas of the Galang Tribe Monica Culpepper and Aras Baskauskas of the Galang Tribe

CBS topped Wednesday, led by the season premiere of Survivor: Blood vs. Water.

The reality series' 27th installment topped the night with 9.5 million viewers and a 2.6 in the adults 18-to-49 demographic, but fell 19 percent from last fall's premiere to mark its lowest-rated fall debut ever. The season finale of Big Brother followed with 6.7 million and a 2.4, down a tenth from last season's closer.

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