S5·E4 Revenge O' The Nerds

With the children growing up, Beverly decides to reinvent herself and quits being a substitute teacher. She decides to focus her energy on going to night school so she can eventually own her own business. Murray doesn't like change or things costing money, so he convinces her to get a perm instead. Meanwhile, Erica struggles to balance her academic and social life in college and needs Adam's assistance.