Marc Maron's 'WTF' podcast ends soon. Here's a look at 7 essential episodes

Marc Maron drops the 1,686th and final episode of his “WTF” podcast Monday. Maron would go on to talk to legends of music and Hollywood, and a sitting president. Fairly famous names had come on Maron's podcast from its 2009 debut, but Robin Williams, the Oscar, Emmy and Grammy winner and luminary of the stand-up stage, was a huge get just seven months into the show.