Luther: So much for sweet dreams in paradise. I guess I'm either used to freezing St. Louie winters, or summer nights that steam the starch out of your shorts.
The German episode titles are "Luther Gillis schlägt wieder zu" ("Luther Gillis Strikes Again") and "Der Ersatz-Detektiv". The French title is "Luther Gillis". The Italian title is "L'onore è salvo", meaning "Honor Is Safe".
John Hillerman comes by his Texas twang in this episode honestly -- he was born and raised in Denison, TX.
The code given by Robin Masters' voice (played by Orson Welles) and used by Magnum in his case is "Rosebud", which was also used by Orson Welles in his 1941 movie, Citizen Kane.