If a theme tune could sell a show, then I think Ironside took the biscuit with this wonderful gritty presentation of an American policeman turned private detective. As soon as this tune came on TV we were hooked.
I think today's tv is good, but those big orchestral intro seem so lacking now days. I thought 1960s American and British TV themes were often gripping. Perhaps there is too much choice today with hundreds of channels, but theme tunes are not what they used to be.