Ernie and Fred, better known as the Redcoats (a British rock duo that's all the craze among the teen set), are performing on Alan's show, which causes issues for the show's staff if only in keeping their screaming female fans at bay. It becomes an even bigger issue for Rob when Mel asks if the Redcoats can stay at his house for one night. Adoring fans always find out their top secret hotel whereabouts, preventing the boys from getting any rest whatsoever, and one night ensconced at the Petrie's would provide them much needed sleep. Rob, who isn't allowed to tell anyone except Laura, reluctantly agrees. Although knowing the worst would happen, Rob and Laura are both dying to tell someone - anyone - that the Redcoats are staying at their house.
—Huggo