I found this episode entertaining, although at this point Stella should just stay at the lab. Seems that every time she's alone and away from the lab something bad happens. Mac and Stella were cute together. I liked the way that Mac looked like he wanted to seriously hurt someone when he was watching over Stella. The young Indy wannabe story was ok, though the whole tie in with a mysterious FDR era whodunit was anti-climatic compared to the necklace mystery. The name switch was an interesting twist though.
I did find the whole coin thing being a story arc interesting, and I wonder how they're going to continue it.