When I first saw that the story was going to be an actor playing duel roles I thought, 'not again'. Nearly every TV show has a story similar and it always seems to be a clunker. But after viewing this episode I can say that I was wrong. This actually was a very interesting and fun show.
The plot involves an RAF pilot, Captain Roberts, that is also well received within the government of Great Britain. In fact Capt Roberts has special clearance where he is briefed by Winston Churchill concerning the war progress. This is where the Germans have a scheme where they will try and assassinate Churchill.
What the Germans have done is taken one of their own officers, Lt. Baumann, that looks just like Capt Roberts and substitute him for Roberts. With some plastic surgery and voice recordings the two people are near identical. The real test, plus the reason they have come to Stalag 13, is that Hogan is friends with Capt Roberts. If Lt. Baumann can fool Hogan then he can fool Churchill.
And sure enough it looks like Hogan has taken the bait. But when Hogan overhears the exact plans, he has to think of a way to get the real Robert out of camp and delay the fake.
This was a better episode than expected. What the writer had was a great story and a nice cast that lead to an entertaining production. With the serious side of the switch and the humorous side of Hochstetter and Klink, this made for an enjoyable and amusing show.