In this gameplay walkthrough of LEGO Batman: Legacy of the Dark Knight for IGN, we show you how to get through the Mr. Freeze section of Chapter Four.00:00 - Intro00:13 - Go to Waynetech and talk to Lucius00:40 - Get the research from the truck03:00 - Go to Ace Chemicals04:48 - Defeat the enemies and collect the chemical09:41 - Go to Sionis Industries and question Black Mask11:57 - Disable Black Mask's security system 1/313:07 - Disable Black Mask's security system 2/314:00 - Disable Black Mask's security system 3/315:46 - Stop Black Mask's escape18:08 - Go to the observatory22:36 - Mr. Freeze prepares his freeze ray23:44 - Defeat Mr. Freeze24:36 - Nightwing comes to the rescue25:55 - Shut down the energy shield27:04 - Disable the freeze ray28:49 - Defeat the Mr. Freeze Mech32:21 - OutroFor more help on Lego Batman: Legacy of the Dark Knight, check out all of our guides at https://www.ign.com/wikis/lego-batman-legacy-of-the-dark-knight