John Spencer (Leo from The West Wing
) was in the movie WarGames
. He played one of the military guys in the bunker at the beginning. He had great lines like this:
"SCREW the procedure. I want somebody on the (#%*^ phone before I kill twenty million people!"
He was also in the first L&O episode ever broadcast (not the first one made; they weren't aired in production order in the first season). He was the victim's father.