Anyone who watches Criminal Minds!!?

I have been searching for an episode. i cannot remember the name or what happens in it. There are only some scenes from the episode that i can remember. At the start it shows a girl being wheeled on a stretcher by a white male dressed as a surgeon. She asks "is this a hospital?" she gets no response so she looks to the left and sees a furnace looking thing and then her eyes widen and the intro starts. Another scene i can remember is she is walking through the same building but it looks like a maze, she encounters choices of paths and locked and opened doors. She goes through a door only to find a pack of dogs that chase her. I can't remember what happens next but i remember in another scene she opens a door and she doesn't notice a step and she falls into a bed of broken glass. She is lying flat on her belly for some time and when she looks up she sees an open door leading out of the building. She slowly crawls there through the broken glass but when she reaches the door, it slams in front of her face. I really want to see this episode again as it was an exciting one from what i remember. Thanks