Between "Saturday Night Live," "South Park," Adult Swim and his various film roles, chances are Bill Hader had a hand in almost every comedy thing you've liked in recent years. This week on Bill Simmons' B.S. Report podcast, he dished on all of that plus his first encounter with Bill Murray, Jon Hamm's knockout "SNL" debut, and Stefon's secret to success. Hader, now in his seventh season on "SNL" (his contract is up after next year) revealed a lot about how the show has shaped his comedic style...