Somehow or other, the Germans have found the location of Stalag 13's escape tunnel. To locate the weak link in their underground security system, Hogan, LeBeau, and Newkirk must break out of camp -- and then back into camp -- without arousing Klink's suspicions. Susanne Cramer appears as Eva. Scripted by David Chandler, Jack H. Robinson, and Laurence Marks from a story by Chandler and Robinson, "The Flame Grows Higher" first aired on April 22, 1966. ~ Hal Erickson, Rovi