Julianna Margulies' The Hot Zone rounds out its cast with Topher Grace, Noah Emmerich and Liam Cunningham
Nick Searcy, Paul James, Robert Sean Leonard and Robert Wisdom are also joining the six-episode National Geographic Channel limited series. James D’Arcy is set to guest-star.
- Watch Julianna Margulies in Nat Geo's The Hot Zone
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- Nat Geo orders drama series on the Ebola crisis, the Secret Service and the Syrian War
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