I had no idea so I IMDb'd him. It was called Field Trip and he was the coroner. BUT even better, he was in a series call IMPALA! Hee! Also, there is a pic of him there, where he looks just like he did on X-Files.

You should check this page out, Jim is really cool! He was a marine in 'Nam! He was with the Dallas Shakespeare Festival for 5 seasons. And he's writing a biography of George Reeves!