In a previous episode Michael says to the Judge that Phoebe from the TV show Friends (1994) would be the only friend to make it to the Good Place. Phoebe was played by Lisa Kudrow, who in this episode plays Hypatia of Alexandria (Patty), who resides in the Good Place.
The sunglasses that magically appeared on Eleanor's head are the same exact pair that she was wearing back in S1:E12 (Mindy St. Claire) during the flashback scene showing her original cause of death.
Paltibaal wears a jacket with the logo of Jason's dance crew, Dance Dance Resolution.
Paltibaal, one of the Good Place residents, said he would have killed for a vaccine, referencing the cut he got on his hand that killed him. Antibiotics, not vaccines, would have been what would have saved his life.