That is a WWII uniform. At that point they continue to engage in sexual relations. That is the point at which it all of a sudden slices to a few people sitting on a mentor watching them on TV. Coincidentally, this person looks cheerful, isn’t that right? Perhaps he was recently educated this was not just one of those where the young ladies investigate the camera, additionally was quite recently told about the ectoplasm scene later in the motion picture.
At any rate, now Professor Rand (Michael Swan) illuminates us that we were watching Hollywood couple Gayle Evelyn and Peter Sherwood. Them screwing by a pool was the last time they were found before a camera. And afterward.