07/30/2012 04:58 am ET Updated Jul 30, 2012

'Political Animals': Vanessa Redgrave Plays An Openly Gay Supreme Court Justice (VIDEO)

On Sunday night's "Political Animals" (Sun., 10 p.m. ET on USA) Vanessa Redgrave guest-starred as Diane Nash, the first openly gay Supreme Court justice and mentor to Secretary of State Elaine Barrish Hammond (Sigourney Weaver).

Elaine turned to Diane to discuss her bid to run for President again, but Diane wasn't sure Elaine had the right motivation.

"Convince me that you’re not doing this because this is still a competition to you and you didn’t come in first," she said.

"It’s different this time," argued Elaine. "I can’t turn away because it'll piss people off. I do have deep convictions about what's right and what’s true."

To which Diane replied, "You better win, Elaine."

Critics loved seeing the two Oscar-winners playing off each other, with TVFanatic calling Redgrave's casting "the perfect choice."

The power plays continue on "Political Animals," Sundays at 10 p.m. ET on USA.

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