Although I know Charles from his roles on Star Trek, he's been all over the place. I know him as Adam in "The Way to Eden" on the original Trek, and Gen. Denning in the Deep Space 9 episode "Little Green Men" ... Beyond that, he's appeared in the Mummy tv series, Roswell series, Mission: Impossible, B.J. and the Bear with Greg Evigan, Austin Powers, and more.
Charles' Official Website