'Marriage Ref,' 'Who Do You Think' get second seasons

marriage-ref-320.jpgMarried couples with petty squabbles, beware: "The Marriage Ref" will be making calls for another season.

NBC has picked up the Jerry Seinfeld-produced unscripted show, along with the game show "Minute to Win It" and the celebrity-genealogy series "Who Do You Think You Are?," for 2010-11. The three shows join the network's Thursday comedies in the safe column for next season.

In announcing the pickups, NBC's head of alternative programming, Paul Telegdy, says each show "has a compelling and innovative format, and a second season will allow these shows to grow creatively and attract an even wider audience."

"The Marriage Ref" is the most-watched of the three, although in its regular Thursday timeslot it's averaged a modest 7.2 million viewers a week. More important to NBC, though, it does well among "upscale" viewers: The network says "Ref" ranks in the top 10 among adults 18-49 with six-figure household incomes.

"Who Do You Think You Are?," executive produced by former "Friends" star Lisa Kudrow, has averaged 6.8 million viewers on Fridays since its March premiere, typically finishing second in its timeslot to CBS' "Ghost Whisperer" (although it did lead its hour among adults 18-49 last week). "Minute to Win It" draws 6 million viewers a week.

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Photo credit: NBC