The premiere of Nat Geo's Brain Games on Monday night averaged 1.5 million viewers over back-to-back episodes, becoming the highest-rated premiere in network history.
The 9 p.m. premiere episode drew a 0.9 rating with adults 25-54 and 1.6 million viewers while the 9:30 episode drew the same 0.9 rating and 1.5 million viewers.
Brain Games was already renewed ahead of Monday's premiere.
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