Land of Black Gold: Part 2 - S2-E11
Other mistake: When Tintin and the Emir are talking with the military adviser, the Emir holds a box of cigars and lets the military adviser take one out of the box. The military adviser then takes out one of the cigars from the box, but the amount of cigars in the box remains the same. (00:27:50)
Chosen answer: "Dollars to donuts" is just a colorful expression meaning you're pretty sure about something (similar to saying "100 to 1" which in betting terms mean I'll put up $100 I'm right and you put up $1 that I'm wrong). Brian is just suggesting baby songs are written by white adults because he's saying white people don't have real problems.
Bishop73