Throughout the 40 seasons of Upper Darby Summer Stage, thousands – literally – have participated in the program. Many remain active in the Philadelphia-region theater community and are taking what they learned from Founder and Executive Director Harry Dietzler of Upper Darby Summer Stage and passing it along to the next generation of theater lovers. Not including those who have branched out beyond the Philadelphia region, alumni of Summer Stage oversee theater programs in all three local states. And in addition to running the theater companies, dozens of alumni direct and choreograph regional high school and middle school productions. Not only are