I don't believe in ghosts. However, I spent ten weeks in an opera house often talked about as having a theatre ghost. Rubish, I thought. One show, I got a call to go to the stage. The cast were very jittery. Especially the dancers. In the left box was a family - mum, dad and two kids. The box was ornate with a solid wood panelled wall behind them, accessed through a single door. Behind the family was a tall Harry Potter like dementor - hooded and cloaked. I grabbed my camera and went to the stage right wings where it was clearly visible. Here are the two pictures I took. I went to see the family in the interval and asked them if anything had happened? They said no - but they were aware everyone on stage kept looking at them. I showed them the picture - they spun around and there was ...... nothing.