Billy Epping is played by Edwin Hodge who is Aldis Hodge's (Hardison's) brother.
When Eliot is showing Nate the information on the Warden while in the infirmary the information states that he is the 'father to Dalton Rand'. Dalton Rand was the character played by Luke Perry in The Future Job (2010).
The corrupt warden is named Adam Worth. This was also the name of a real-life criminal who Scotland Yard referred to as the "Napoleon of Crime" and who was the partial inspiration for Sherlock Holmes' nemesis, Moriarty.
When Sophie is taking Adam Worth (the warden) through the State Party Election Headquarters, you can see election signs for Geoffrey Thorne, Doug Young, Christine Boylan, Scott Veach and Emily Weston - these are names of people who all worked on Leverage. Also, the candidate for Senate that Adam Worth is to replace - Gary L. Camp - is also the name of someone who worked on the show.
The jail at the center of the episode is the Rockford Private Correctional Facility, another reference to The Rockford Files, one of the inspirations for this show.