go to sleepnumber.com for a store near you. >>> the father-son comedy powerhouse carl and rob reiner philosophy. our brooke baldwin salt down with them for tonight's "history of comedy." brooke is here with a preview. >> last week it was betty white, this week carl and rob reiner. imagine, you have spinal tap, princess bride, all in the family, dick van dyke, whej harry met sally, a few good men. when you're growing up in this household and you're rob reiner, the son and dad carl didn't say, son, i want you to follow my footsteps, this is a home where mel brooks comes over every night for dinner, still. so through osmosis, they're hysterical, and also they do not hold back when it comes to president trump. >> let's watch. >> did you grow up laughing in this house? >> the funniest people in the world came into this house. people asked a million times what it was like growing up in a household where there's mel brooks and norman lear, the funniest people in the world. as a kid you're growing up, you don't know -- that's your reality. >> i was trying to think of when he was very, very y