Chuck tells Eric the code to the safe is 8-7-69, his mother's birthday. Chuck was born May of 1991, making his mother just a few months shy of her 22nd birthday when she died.
While Dorota is following the ever-bossy Blair around, Eleanor calls Dorota's cell and fittingly, the ringtone is "I'm a Slave 4 U" by Britney Spears.