S1·E19 Cold Storage

Just before a very important banquet with guests, Benson and Kraus go in the old storage room to look for something and the door shuts on them. With minimal healthy air and a freezing temperature Benson and Kraus have to find themselves a way out. Benson risks it all when he starts a fire near an old heat duct and the mansion fills with smoke. That is the way the firemen tracked them.