Mr. Young S01E10 - Mr. Big Brother

Mr. Young (2011)
S01E10 Mr. Big Brother
Episode Overview
When Adam learns that Echo is bringing her "little sister" to the school carnival, he decides to sign up as a "big brother" so he can join them for the day. However, things take a turn when Echo's "little sister" begins to obsessively follow Derby, while Adam's "little brother" ends up spending most of his time with Echo.