LeBeau and the Little Old Lady (1968)
Season 3 Episode 25 Trivia:
In Colonel Klink's office, sometimes a map is shown of the camp.
In the lower right of the map, it says 'Stalag 13'.
The map shows what looks like many prisoner barracks
which would hold dozens of prisoners,
yet, when Sergeant Schultz does roll call,
there are only about 20 prisoners shown.
Schultz apparently does roll call for only one barracks.