Television in the kitchen turns itself on/

I think I'd better check out my spy camera. My dogs and I were in the library when my wife comes in from the kitchen and tells me the television on the mantle in the kitchen suddenly switched on. This is a small set that is rarely used. Although the TV had a remote, it was misplaced months ago and we turn it off or on manually at the set. It is always on the same channel; the only one that is clear. This happened once before several months ago. Not being familiar with the workings of digital TVs I'm not aware of just what, if anything, can turn them on. My spy camera is set up in the parlour towards the front hall and not, unfortunately, the kitchen. But if the spooks are getting restless, who knows?