Of course, true crime and podcasts go hand in hand. The Hulu comedy “Only Murders in the Building” is explicitly a parody of the ubiquitousness of the genre. And there are plenty of other podcasts on the charts that center on bloody mysteries, with titles like “Morbid,” “Crime Junkie” and “My Favorite Murder.”Still, the “Dateline” podcasts are helping the genre reach a new audience. The median age of viewers of the Friday night edition of “Dateline” is 63, according to Nielsen. On Spotify, the median age of a “Dateline” podcast listener is 41, according to data from Chartable, which was supplied by NBC News.The network declined to disclose revenue …
