Numb3rs Season 4 Episode 3 Velocity

A typical morning at a coffee shop is thrown into chaos when a car slams into the cafe, killing one and injuring several. However, the team soon finds that it may not be an accident after all. Larry suggests that Dr. Ray Galuski, a mechanical engineering professor, might be very helpful in the investigation. Ray and Alan hit it off immediately and soon Alan is going back to school part time.