Thanks! I wibbled when I saw the YouTube video that elainegrey linked to, but when I looked at a couple of other videos, I began to think maybe they hadn't spoiled it by reworking the effects.

I think I am something of a purist though. And I've basically never seen the whole, uncut series in color. (I watched it when it originally aired, but on a black and white TV, and I watched it many times in syndication, but they cut pieces out of it to make room for more ads.) So I think I wanna watch it as it was originally aired.