the way to Berlin by train, and once from Gestapo headquarters in Paris. Captain Fritz or Felix Gruber (portrayed by Dick Wilson) – Gruber is Klink's adjutant in "Don't Forget to Write", and becomes the new ruthless Kommandant of Stalag 13 after Klink mistakenly volunteers for the Russian Front. Because Gruber is hard-nosed and not easy to manipulate, the prisoners desperately want to get Klink back. Hogan orders three prisoners to escape and hide. When Gruber is unable to recapture them, Burkhalter orders Klink to find them, which he does with Hogan's aid. Burkhalter decides to leave him as Kommandant. Gruber appears in one scene each of two other episodes (with Hogan assuming his identity to visit the home of a general in the first of those episodes). In addition to Gruber, several other junior officers and capable NCOs are occasionally assigned to Klink's command, but Hogan always finds a way to get rid of them. Corporal Karl Langenscheidt (portrayed by Jon Cedar) – Langenscheidt is one of Schultz's guards. He is only seen or spoken of occasionally (mostly in the first-season episodes). He often arrives with poor timing, such as informing Klink that an important guest has arrived unannounced, much to Klink's displeasure. In "Art for Hogan's Sake", Langenscheidt gets involved in Hogan's scheme to forge the priceless Édouard Manet painting "The Fife Player", and switch it for the real one General Burkhalter had "requisitioned" from the Louvre in Paris to give to Hermann Göring as a birthday present. Frau Gertrude Linkmeyer (née Burkhalter) (portrayed by Kathleen Freeman, played once by Alice Ghostley) – Frau Linkmeyer is General Burkhalter's sister. She is usually in a one-sided relationship with Klink, who does not return her affection. Her previous husband, Otto, is missing in action on the Russian Front; this leads General Burkhalter to arrange meetings between her and Klink in order to marry her off. Later in the series ("Kommandant Gertrude"), Frau Linkmeyer arrives at the camp with her new (and reluctant) fiancé, Major Wolfgang Karp (Lee Bergere), whom she intends to have replace Klink as Kommandant, but Hogan manages to foil her plans and their engagement. Lieutenant Maurice DuBois (portrayed by Felice Orlandi) – Maurice DuBois is a French Underground contact who appeared in three episodes. (Orlandi's real-life wife, Alice Ghostley, appeared in two episodes.) Major Bonacelli (portrayed by Hans Conried in the first appearance, Vito Scotti in the