At 12:50 Spencer introduces himself as being with Roskin Consulting. Marc Roskin is an executive producer on Leverage.
The people around the congressman when Parker hides the bribe in his trophy are holding signs cheering for the "Badgers." The Badgers were the team for the high school in season three's "The Reunion Job," which the team used as a password.
K Street in Washington DC was long known as the center of the lobbying interests.
Though the shows location had switched from Boston, MA to Portland, OR, the show still used exterior shots from Boston. The building labeled the PEP Athletics Headquarters in Washington DC is actually the John J Moakley Courthouse that overlooks Boston Harbor.
At 30:41 Wendy tells Nate to "Bring it on". "Bring It On" is the name of cheerleading competition movie starring Kirsten Dunst.