The code machine Hodgins provides to Booth is not an Enigma machine.
When Brennan discovers the victim had cutaneous leishmaniasis Cam says, it's not a domestic disease, which it actually is, found in North Texas, she says people in the Middle East contract it from sand flea bites. Leishmania parasites are transmitted through the bites of sandflies only, a fly comparable to a mosquito but 1/3 it's size. Both Brennan and Cam would know this as an anthropologist and a coroner.
At 1m 38s, Hodgins is wiping blood off his face with the lower half of his index finger, yet in the next shot the blood is only on the tip of the finger.
As Cam is drawing blood from Hodgins, she states he has a needle in his radial artery. She is drawing back on the syringe, and the blood is dark. If it truly were in the artery, the force of the arterial pressure would have PUSHED the plunger back, and the blood would have been bright red, denoting the high concentration of oxygen in the blood. As a M.D. Cam would be aware of this.
Angela having a biopsy will not double the chances of finding a result, the chance of finding the result would still be exactly the same. Hodgins is a genius and should have corrected her.