My mum (who has other hallucinations anyway) started thinking the people on TV were speaking directly to her & was interacting with them, as though it was a real two-way conversation. At first I felt didn't really matter because I thought it would be 'company' for her. Then it progressed to her thinking the people were actually in the room & talking to her, then their 'non-stop talking' started to get her down because she said she was putting off going to the loo when she was absolutely desperate, or put off going to bed until about 1.00am, because she thought it was very bad manners to walk out on them whilst they were speaking to her! She kept on about how she'd had good manners drummed into her as a child. No matter how much I told her the people on the TV can't see or hear her & were not actually in the room so it was fine if she wanted to leave the room to go to the loo, or switch the TV off when she'd had enough or wanted to go to bed, of course she wouldn't believe me. Her usual night-time hallucinations have got worse & the people in her bed & bedroom have now started making 'sarcastic comments' to her, & she sees people elsewhere in the house & during the day now.
So, I censor what she watches with me when I 'm there, but otherwise I've pretty much stopped her having the Tv on now, just radio, or I put a CD on for her. I've been in touch over the last week with her GP re worsening hallucinations & episodes at night of panic, confusion & disorientation (rather like Sundowning but during the night) - he's referred her back to the psychiatrist at the Older Persons Mental Health Clinic & she's going to try mum on some Memantine tablets. She currently takes Luventa tablets. We're just waiting for a nurse to visit to do a blood test first.
It's a shame not to be able to watch TV any more because it's good 'company' & keeps them occupied even if they can't follow what the programme is about, but if it's causing problems then the only option is to turn it off & hide the controller!