Cracked

The NCIS team investigate the death of a Navy researcher who was hit by a bus in the middle of a busy street. They are surprised to find that her entire body is covered in elaborate mathematical formulae, but begin to suspect her death was nothing more than an accident after finding evidence that she was becoming increasingly paranoid. Recognizing the researcher as a kindred spirit because they share similar thought processes, Abby starts to become fixated on solving her equations and her new-found obsession drives a wedge between her and the rest of the team. As the team discover that the researcher was being poisoned, Abby deduces that the formula is a method of converting bacteria into fuel. The trail leads back to a jealous co-worker, who poisoned the researcher in order to take her job. Meanwhile, Tony's latest fling causes trouble when she suggests role playing, but refuses to tell Tony what she has in mind. Her fantasy is later revealed to be Tony Manero from Saturday Night Fever, evidenced by a very uncomfortable Tony attempting to sneak out of the Navy yard in a white disco suit.