Mark Feuerstein has received critical acclaim for his roles in feature film, television and theater, but he is best known for his lead role as Dr. Hank Lawson in the series "Royal Pains." Inspired by his real life experience, he wrote and created "9JKL" with his wife, executive producer Dana Klein. Most recently, he appeared on "Prison Break" as arch-villain Jacob Ness. Additional television credits include "The West Wing," "Sex and the City," "Once and Again," "Fired Up!" and "Good, Morning, Miami." Feuerstein will next be seen in "Wet Hot American Summer: 10 Years Later," which will be released this summer. His feature film credits include "Defiance," "In Her Shoes," "Abandon," "What Women Want," "The Muse," "Rules of Engagement," "Woman on Top" and "Practical Magic."