Better than a rat's anus
Nazi comedy. No, don't run away. This is comedy gold. The line, "Are we the baddies?" will go down in the annals of Nazi comedy along with "Don't tell him, Pike" and "Yes you did, you invaded Poland".
Mitchell and Webb (for it was they) did this originally on the wireless, but in this case the TV adds something. And the ending is pure Monty Python.