The first scene they shot was with newcomer Teddy Sears as Jay Garrick in a S.T.A.R. Labs van with Danielle Panabaker as Caitlyn Snow shooting a scene where the pair get pretty cozy.
There was then a scene with a mysterious woman shooting a scene where she was staring towards the van. When I tweeted about this woman, I got several replies stating its Kimiyo Hoshi, aka - Doctor Light. Even other more in the know sources on all things comic book related suggested it was her as well. So for now, till I hear differently, that is who I am suggesting it is.
The Flash season 2 is on now with episodes airing Tuesday nights on The CW in the U.S. and on CTV in Canada.