Complex sentence: The scene cuts to ten days earlier, where Claire and Ray were practicing the act they would present when it was revealed that Ray would be Claire's handler and there was a hidden microphone in their room monitoring them.
Split into simpler sentences: The scene cuts to ten days earlier, where Claire and Ray were practicing the act they would present when it was revealed that Ray would be Claire's handler. Unbeknowst to them, there was a hidden microphone in their room monitoring them.