Hogan is assigned to blow up a German train, but can't get past Stalag 13's beefed-up security. Hoping to keep Klink occupied while he attempts to slip away, Hogan arranges a cozy tête-à-tête between Klink and General Burkhalter's matrimony-minded sister -- but Klink, unwilling to be railroaded into marriage, becomes more vigilant than ever in guarding the camp. Alice Ghostley substitutes for Kathleen Freeman in the role of Gertrude Burkhalter. Written by Laurence Marks, "Watch the Trains Go By" first aired on February 1, 1969. ~ Hal Erickson, Rovi