This week on Mark and Dan Meets World, the guys review Grandma Was a Rolling Stone! Relive what happens when Cory's grandma drops by unannounced and ditches her plans with Cory!  Listen to Mark and Dan recap this episode with tons of laughter and great memories. This episode guest stars TV legend Rue McClanahan, as well as a teenage Keri Russell! This is more fun than swapping spit with a Feeny!