We've mentioned this before but please try to remember not to mix realities. The DS characters don't know DC and the actors and the production crew exist because they exist in their own reality world apart from the actors and the production crew. Similarly, DC and the actors and the production crew can't interact with the characters because the character don't exist in the real world. In other words, each world has its own reality. The characters interact within the world of DS - the actors and production crew interact within the real world - and never the twain shall meet.
Now, in this instance:
"Okay, Mr. Curtis, that's wrap....everyone can go home now."
it's presumably only a dream/hallucination, so some leeway can be given. But be very careful when dealing with reality...