 CONT: After Dr. Lester, in Kirks body, first arrives on the bridge  and starts issuing orders, a wide shot of the bridge clearly shows a  crewman other than Chekov at the navigator station. At the tail end  of this shot, Lester/Kirk specifically addresses his order to  Chekov. In the very next shot Chekov is suddenly at the navigator  station to hear the rest of Lester/Kirks order.