I was watching Scarecrow & Mrs. King last weekend, and Dana Elcar guest starred as Lee Stetson's boss. Actually, the role was pretty similar to his role as Pete Thornton-- he was the head of the agency. In this episode, Dana's character suspects Amanda King (Kate Jackson) is a spy who has infiltrated the agency, and he demands that she be fired. But, of course, it turns out that he's wrong, and the spy is someone much closer to him.
I couldn't see him as anyone other than Pete, though.