I hope you had a restful and relaxing vacation.
There are two things to remember about this site.
1. The posts are not in order. You should start on the missions page and find the next scenario you have not completed.
2. Take good notes on each problem. You will use what you learn in one problem to solve another problem.
The latest case is about Col. Chaos. Study his picture in case you run into him.
Best of luck Math Spies!