Happy was originally voiced by Bobby Moynihan in the pilot before being replaced by Patton Oswalt.
A cell phone ringtone in the first episode is the same ringtone Chev Chelios has in Crank (2006), which was co-directed by Brian Taylor.
Ringtone for smoothie's phone is Bad Romance by Lady Gaga
Canceled in May 2019 after the show's season 2 finale, by SyFy.
In Season 2 Episode 1, Isabella asks Mr. Blue why he is talking like Madonna. Debi Mazar, who plays Isabella, has appeared in several of Madonna's music videos.