I was finishing up the second season of Quantum Leap on DVD last night when the opening credits for the episode "Sea Bride" revealed a John Hertzler. Suspecting that he would become better known by his initials, I did not keep an eye out for a face I wouldn't recognize without extensive makeup, but an ear open for an unmistakably gruff voice. Sure enough, there he was — the man better known as Deep Space Nine's General Martok.
In the above shot, he and Scott Bakula share a victory; below, they toast their glory with a mug of bloodwine.
His characters are surprisingly similar, with almost interchangeable lines. You'd expect the following retort to come from Star Trek — but it didn't: