Fox’s two-hour So You Think You Can Dance (2.4/7 among adults 18-49, 6.5 million total viewers) slid 8% in the demo from last week’s fast national, 11% from the final, but still dominated Wednesday’s primetime. It delivered a nightly win for Fox in both adults 18-49 and total viewers. The drop for the only other original offering on the English-language broadcast networks last night, CBS’ Dogs In The City (0.9/3), was bigger — the new summer series was down 30% in the demo from its modest premiere last week.