JoAnna was calling her University colleagues who did their practical training and asked them about conditions they work in. They were all curious why she is interested about that, and when JoAnna told them that she plans to move to LA, she met with a shower of questions: 'Why would you leave FMC? What about Dr. Light? … How come he is not your mentor anymore?'
Oh, Greg found out that JoAnna is in LA! He is smarter than an average stalker.