Apparently Ironside was to come back in the next episode (#20) which was never filmed (obviously). Faye Grant's character was also to have been killed off as Diana got control back. Then the series would have changed focus - again - and become more of a road show with a quest, with Donovan, Tyler, Kyle, Elizabeth and Willie looking from some object which was to be a key to defeating the visitors. It usually takes years for a series to get that far away from its original concept. V took months.