Rear window jumped the track and fell into the door?

You need to replace the door window regulator, it is a cable drive setup. Remove applicable trim panel and moisture barrier. There is a screw under the plate behind the inside door handle, and push clips around panel, then lift from pull handle. It is not an easy task just considering the finesse involved with panel removal. The barrier is held on with two stage push pin retainers. The regulator and glass are 10mm fasteners. Check out the images (Below). Please let us know if you need anything else to get the problem fixed.