Again counting on the fact that the Allies won't bomb a POW camp, the Germans bring a tightly guarded truck containing a barrel of heavy water into Stalag 13. Suspecting that the water might be used for a weapon of some sort, Hogan must find a way to get rid of it. The answer: Convince Klink that the radioactive water is a delicious health tonic! Prolific Hanna-Barbera voice actor John Stephenson appears as Captain Mueller. Written by Arthur Julian, "Go Light on the Heavy Water" originally aired on November 12, 1965. ~ Hal Erickson, Rovi