Act Your Age (Phineas and Ferb)

Are we ever gonna see Phineas and Ferb as teenagers? Yes. Yes, we are.

In this special episode set ten years in the future, a teenaged Phineas must decide between two colleges while grappling with the discovery that Isabella has had a crush on him since they were kids. Ferb and the gang try to bring the two together so they can admit their true feelings for each other before Isabella leaves for school. Meanwhile, Doof wants a midlife crisis and builds a Mid-Life Crisis-Inator