There's two, although at least one is disguised as a picture. It's at the other side of the fire place to the rainbow book display on the Ikea like low cabinet.
The other one is on the wall that divides one of the bedrooms from the walk in wardrobe. That one might be disguised as a mirror, or it could just be light reflection.
I can usually spot them because I'm surprised how many TVs most people have. We've only ever had one, but if you look at a lot of sale listings, it's not unusual to see 3/4/5 TVs in a family home.