It's an "ER" reunion on "The Good Wife" when Maura Tierney makes her debut as Maddie Hayward, a millionaire business professional who considers giving to Peter Florrick's (Chris Noth) gubernatorial campaign.

In the photos from "And The Law Won," Julianna Margulies reunites with her former "ER" co-star Tierney. It looks like Christine Baranski's Diane Lockhart will also have a meeting with Tierney's character. Take a look at the new photos below.

"The Good Wife" Season 4 premieres Sun., Sept. 30 at 9 p.m. ET on CBS.

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  • "Ice Ice Baby"

  • "Ice Ice Baby"

  • "Ice Ice Baby"

  • "Ice Ice Baby"

  • "Ice Ice Baby"

  • "Ice Ice Baby"

  • "Ice Ice Baby"

  • "The Next Day"

  • "The Next Day"

  • "The Next Day"

  • "The Next Day"

  • "The Next Day"

  • "The Next Day"

  • "The Next Day"

  • "The Next Day"

  • "The Next Day"

  • "The Next Day"

  • "The Next Day"

  • "The Next Day"

  • "Hitting The Fan"

  • "Hitting The Fan"

  • "Hitting The Fan"

  • "Hitting The Fan"

  • "Hitting The Fan"

  • "Hitting The Fan"

  • "Hitting The Fan"

  • "Hitting The Fan"

  • "Hitting The Fan"

  • "Outside The Bubble"

  • "Outside The Bubble"

  • "A Precious Commodity"

  • "A Precious Commodity"

  • "A Precious Commodity"

  • "The Bit Bucket"

  • "The Bit Bucket"

  • "The Bit Bucket"

  • "The Bit Bucket"

  • "The Bit Bucket"

  • "The Bit Bucket"

  • "The Bit Bucket"

  • "The Bit Bucket"

  • "The Bit Bucket"

  • "The Bit Bucket"

  • "The Bit Bucket"

  • "The Bit Bucket"

  • "The Bit Bucket"

  • "The Bit Bucket"

  • "The Bit Bucket"

  • "The Bit Bucket"

  • "The Bit Bucket"

  • "Everything Is Ending"

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