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Downton Abbey

Courtesy of (C) Carnival Film & Television Limited 2012

No one can take someone down a peg or six like Downton Abbey's Dowager Countess. Until Shirley MacLaine's Martha Levinson comes along, that is.

Though Maggie Smith delivers a trademark zinger in the first clip from Downton Abbey's third season, it's the head-to-head with Martha (mother of Lady Cora) in the second clip that really whets our appetite for some good old-fashioned Brits-versus-Americans drama.

Watch the videos below, and then head on down to the comments and start a Downton party. We'll be down there in a sec.