Brian M. McKeon, department head for natural sciences in Penn College’s School of Integrated Studies,returns to the Community Theatre League stage as”Mack” in “A Family Plot,” which begins a two-week run Friday at the 100 W. Third St. venue. The sixth collaboration between CTL and Mark Dunn, the theater’s playwright-in-residence,the “conniving comedy” is the latest in a string of local productions for McKeon. He also appeared in “Dearly Departed,” “Duck Hunter Shoots Angel,” “Bedside Manners” and “Cheaper by the Dozen.” The cast includes 2002 alumni and CTL regulars Nicholas I. Buckman (mass communications) and Keith A. Wagner (computer information technology: data communications and networking concentration), as well as McKeon’s youngest son, Kaleb. It will be presented at 7:30 p.m.April 1-2and 7-9, and at 2 p.m. April 10; tickets are available at the box office or online. In addition to the onstage talent, Penn College also is represented on the technical crews and asthe overall sponsor for the production.