begin this evening with a conversation about food with the great alice waters, fanny singer and calvin trillin. >> it's just a matter of coming back to our senses. i mean this is the way that we've done it since the beginning of civilization. and somehow it's been lost in the fast food culture in this country. and we are doing really crazy things. we're feeding ourselves that isn't good for us. >> rose: we continue about talking about the new periscope with kayvon beykpour. >> we had this inkling what would become periscope and we built a stereotype. it was a reverse google map. we wanted to drop a pin in the world and see what's happening. photography isn't effective as a medium as opposed to what's happening now. we didn't want to have a live video company and that was the means to the ends. >> rose: we conclude by talking to the actor peter sarsgaard about his new film experimenter. >> there are several realities going on in this specific experiment. you have the person who thinks they're electrocuting someone else. that's the reality of the valid reality. it's true to them. the actor in th