‘The Staircase’ is HBO Max’s new true-crime series about the shocking death of Kathleen Peterson. See the cast side-by-side with the real people.
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‘The Staircase’ Cast: Michael Peterson & More
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Toni Collette As Kathleen Peterson
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Patrick Schwarzenegger As Todd Peterson
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Sophie Turner & Odessa Young As Margaret & Martha Ratliff
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Olivia DeJonge As Caitlin Atwater
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Parker Posey As Freda Black
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