This is a good film history one, that's gotten rave reviews and is frequently in the top 100 Podcasts in ITunes or something like that: You Must Remember This: The Secret and/or Forgotten History of Hollywood's First Century.
Written and narrated by someone who really does her research. The podcast often does extended series on stories that involve, yes, some political
& larger cultural aspects - a very-well received long series on the Manson family murders and the relation to Hollywood, a recent Jean Seberg & Jane Fonda series involving actresses with similar troubled radical politics journeys (Vietnam, Black Panthers, 2nd wave feminism, etc.), another one on Hollywood stars' involvement in WWII, as well as a series on actors/directors/screenwriters that were blacklisted for supposed Communist sympathies during the 40s-50s (McCarthyism).
See the archive here.
Written and narrated by someone who really does her research. The podcast often does extended series on stories that involve, yes, some political

See the archive here.