ARRRRRRGGGG!!! I am stuck in the part of the game where you have to defend the batcave entrances. I have beat up all of the bad guys but I can't get anywhere afterward. What do you do next???

when your're protecting the batcave watch the map in the corner of the screen you'll hear a knocking sound when theres someone beating up on the door watch the map the door thats being attacked will flash only attack the Red thugs they are the only one who can attack the doors use your flash bang pellets or smoke pellets if you need the upper hand at all ok well hope this helps