“I‘m just an obnoxious guy who can make it appear charming, that’s what they pay me to do,” said Bill Murray in an interview with T.J. English for Irish America in 1988. In the newest episode of PBS Digital Studios’ “Blank on Blank,” Murray cracks wise on giving back to his mom when he made it big, hijinks on the set of Ghostbusters, the spiritual change that saved him from destruction, and how fame sort of helps with talking to women.