When Noah Bennet and Quentin Frady are searching for information, Noah pulls out books to open a secret door. The titles of the book are references to different characters. "Haitian Voodoo" is a reference to The Haitian, "The Invisible Man" is a reference to Claude Rains and Peter Petrelli, "Finding Yourself" is a reference to Molly Walker, and "Pennies from Heaven" is a reference to Casper Abraham.
When in the room with the computers, Noah looks at a screen where the name Molly Walker is highlighted red. A few names down is Micah Sanders, Nikki's son from the original series.