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The season teaser was released Wednesday on Apple Podcast and other streaming services.
"We chose Cleveland because they let us record everywhere: courtrooms, back hallways, judge's chambers, prosecutors offices," Serial host Sarah Koenig said in the tease.
During the show's first two seasons, a single case was highlighted. But Koenig and reporter Emmanuel Dzotsi will follow many stories this season for the investigative journalism podcast.
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The first two episodes of the new season will debut Sept. 20. Additional episodes will be released Thursdays.
Launched in 2014 as part of a collaboration with WBEZ in Chicago, the last two seasons of Serial have been downloaded 340 million times, according to a recent Los Angeles Time article.
Serial Productions released the popular podcast series S-Town in 2017.
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