The person gets angry when told the TV show is new and they could not have seen it "I have seen this TV show before" (it's new), or the conversation did not happen. This is a fairly recent situation and follows years ago onset of short term memory loss and some loss of cognitive function (no longer drives; computer skills diminished somewhat; etc.). Verbal and conversational skills remain good. On lengthy list of meds for pain, depression, blood pressure, cholesterol, thyroid, others.
Having the meds checked periodically and keeping the doctor informed about new symptoms is a good idea. This particular symptom doesn't seem especially dangerous to me. I would just go along with it and not argue.
ty.