The show had characters played by actors from Rob Thomas iZombie (2015) (Robert Buckley and Rose McIver), as well as Veronica Mars (2014) and Veronica Mars (2004).
This series has appearances by actors Ryan Hansen, Kristen Bell, Robert Buckley, Francis Capra, Enrico Colantoni, Percy Daggs III, Jason Dohring, Kyle Gallner, Christopher Lowell, Christopher B. Duncan, Ken Marino, Rose McIver, Ryan Devlin, Amanda Noret, Daran Norris, and Lisa Thornhill, from the following shows: iZombie (2015), Party Down (2009), Veronica Mars (2004), and Veronica Mars (2014). Rob Thomas created all five shows.
Ken Marino also appeared in Veronica Mars (2004), Veronica Mars (2014). Party Down (2009), and the iZombie (2015) episodes, Dead Beat (2016) & Spanking the Zombie (2017). Rob Thomas created all five productions (including Play it Again Dick)
Kristen Bell equates Private Dick to making a show about Billy Zabka and Cobra Kai. In 2018 they did make a successful show about just that Cobra Kai.
Lisa Thornhill (Celeste Kane) also appeared in Veronica Mars (2004) and Veronica Mars (2014). All three shows were created by Rob Thomas.