Klink's safe is a safe that is in Klink's office. The safe is where Colonel Klink's would place what he would consider his most important documents, as well as the papers of any German officers, scientists, buisnessmen, etc., who would visit Stalag 13. Unfortunately, for Klink, those papers are hardly safe, thanks to the safe-cracking skills of Corporal Newkirk. In a few other episodes, a prisoner would actually be inside the safe, so that the prisoner could listen in on any conversations that would take place inside Klink's office.