If I could change on thing about myself, I would: Have better knees. Mine are shot because of injuries. You're only as good as your legs, whether you're an athlete or an actor.

President John F. From 2000 to 2010 he played Dr.  ???
The Time of Your Life.

Gilbert "Gil" Grissom on the hit CBS series CSI: Crime Scene Investigation Richard Chance in the film To Live and Die in L. and as Will Graham in the film Manhunter. William Louis Petersen (born February 21 1953) is an American actor and producer best known for playing Dr.