The appearance this Friday will be the first time the voluble V.P. has visited with Jay Leno since January of 2009. Biden previously appeared in 2007 and in 2008, shortly after becoming the vice presidential nominee.
Biden's visit could signal that he doesn't hold grudges.
During the 2008 presidential campaign, Leno joked that Republican vice presidential nominee Sarah Palin was going off script and making embarrassing statements so often that "her Secret Service code name is now Joe Biden."