I recently subscribed to American Scandal, another Wondery production. They just finished their latest scandal, Bernie Madoff, and announced the next will be McCarthy. I like the range of topics, from the Unabomber to the Tuskegee Syphilis Study. They even have a single episode on the Comiskey Park Disco Demolition fiasco, which as a Chicagoan of a certain age, I really loved listening to!
They usually cover the topic over five to eight episodes, with the final one being an in-depth interview with an expert on the topic.