They could do nothing except stand gazing into one another’s eyes. To run for life, to get out of the house before it was too late – no such thought occurred to them. Unthinkable to disobey the iron voice from the wall. There was a snap as though a catch had been turned back, and a crash of breaking glass. The picture had fallen to the floor uncovering the telescreen behind it.
‘Now they can see us,’ said Julia.
‘Now we can see you,’ said the voice.

George Orwell

1984. Part 2, Chapter 10. For Winston and Julia the game is up. They have been under surveillance from a hidden telescreen all along and Big Brother has heard their every word.