I haven't watched it, but I have read the main series and the prequel novel Asimov wrote late in life. I believe that one takes place around the first season of the show (Seldon making his early psychohistory investigations and finding the Empire is doomed). He does start including women there. Second half of the second book also has a prominent female character.
Keep in mind that those early works were done as short stories for Astounding Science Fiction under the guise of John Campbell. He's responsible for guiding the golden age of SF. Much of it was good in terms of stories and ideas, but he didn't give two shits about female characters. In fact, he never pressed anyone to have characters of any gender to be thicker than cardboard. Finding an interesting character in that era is rare.