Season Four, Episode Two
'I did Big Sister in college. That little girl taught me how to use tampons' – Liz
In the episode "Into the Crevasse," Kenneth asks Liz if he can only work 20 hours that day so he can volunteer at an animal shelter. He mentions that he also volunteers for Pthe ants for Zoo Animals program and Big Brother, "an organization that secretly watches people and makes sure they are behaving properly."