When Tammy One enters Ron's office while April, Andy, and Leslie are helping him go over receipts, you can see April consciously sit up straight. In the previous episode I'm Leslie Knope (2011), Tammy One told April "Sit up straight; you're not doing your breasts any favors."
Tammy One was mentioned to have been a candy striper who helped deliver Ron Swanson and to have been the Sunday school teacher of Ron Swanson and Tammy Two. In real life, Patricia Clarkson (Tammy One) is one year younger than Megan Mullally (Tammy Two) and 11 years older than Nick Offerman.
Paula Pell, who plays Tamara Swanson, is only seven years older than Nick Offerman, who plays her son Ron.
When introduced to Ben, Jean-Ralphio asks if that's his real name and declares Ben needs a better name (Angelo, then Jello Shot, then J Shot). The actor who plays Jean-Ralphio is named Ben Schwartz.