 CONT: This episode begins with the Captain down on the planets  surface wearing a gold shirt with no insignia. When he beams up to  the Enterprise, he is still wearing a gold shirt with no insignia,  and his "evil half" also transports in wearing the same: a gold  shirt without any insignia. Scotty offers to walk the Captain to his  quarters and, miraculously, when we cut to the Captain and Scotty in  the corridor, the Captains shirt has sprouted an insignia as has  the evil twins shirt when he walks into Dr. McCoys medical bay.