While reuniting with the other guards with Doctor Rosenburg, right before entering the room with the staged fire fight (I had already loaded in the next room), I double back before the game could properly "block" or gate my progress to prevent from returning to the stairwell (thus loading in the previous room). I did so because I was low on health after the previous hallway encounters with the guards/turrets. I picked up the additional health at the bottom floor of the stairwell and once again head back to the upper floor, but upon meeting up with the group, Rosenburg approaches right next to the cowering scientist, who is still cowering, and simply stands there. The scientist does not leave her pose and no lines are delivered, which lends me to believe I broke a scripted sequence involving them.

The guards all proceed down the stairwell (dialogue is once again present in these scenes). Rosenburg follows, but immediately stops and heads back to the other scientist. I go all the way downstairs, break the boarded up wall with a crowbar, and come upon a door with a keypad that me nor the guards open. I wasn't sure if Doctor Rosenburg was suppose to open this door for you, but I couldn't get him to go down the stairs no matter what I did.