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From Deadline.com

The first footage from the second season of WGN America’s nuclear drama Manhattan confirms actress, Neve Campbell on board in a recurring role. Creator Sam Shaw’s fictionalized rendering of the 1940s’ Manhattan Project in Los Alamos and the build-up to the detonation of the Trinity A-bomb returns October 13, 9 PM ET.

Watch the trailer below on youtube with a few clips featuring Billy.