My husband has been forgetting/repeating things for years, but more recently he sees people who just aren't there. This usually occurs when he has been dozing/snoozing, but often during the evening. He will ask me how many people are coming to dinner (just the two of us, always). He will also ask who was it he was just talking to, and where did they go? (We live in a small bungalow, where we keep both front/back doors locked, so no-one can get in without me knowing). I try to just say that there is just the two of us here now, but he often wants to know where the others are, and what was I saying to them. Can get very angry if I insist no-one else here. Also, at night, he has taken to securing the bedroom door to stop others coming in - even though I have walked him round the house before bedtime so he knows no-one is there. What is the best thing to say and do?