Not only is Topher Grace a "Saturday Night Live" superfan, he even got the opportunity to guest host an episode in 2005. Now one of the stars of Nat Geo's limited thriller series "The Hot Zone," Grace stopped by the podcast to discuss his favorite episode of TV ever — a 1991 Saturday Night Live edition hosted by Steve Martin. Plus, we talk about his recent dramatic turns in "Blackkklansman" and "The Hot Zone," and, of course, whether there will ever be a "That '70s Show" reunion. Learn more about your ad choices. Visit megaphone.fm/adchoices