John Rubinstein plays lawyer Daniel Webster, a lawyer who sold his soul to the devil to become the greatest lawyer ever but was then cursed to represent and free the most evil defendants. Previously John Rubinstein appeared on the supernatural show Angel playing Linwood Murrow, a lawyer who sold his soul to the devil and works for the demonic law firm of Wolfram & Hart where he represented and freed the most evil defendants.
When Sabrina runs into the girls bathroom, there is a sign on the wall that says "Plug It Up, Plug It Up, Plug It Up", a reference to the scene in Carrie that takes place in the girls locker room, and is the precipitating incident for Carrie's powers.
"The Devil and Daniel Webster" is a 1936 short story in which the famous real life lawyer Daniel Webster defends a man who sold his soul to the Devil.
Ambrose hears knocking at his window and then Luke appears in his room and says "open the window mark" a reference to the 1979 movie Salem's Lot.
The Devil and Daniel Webster is a 1941 supernatural film based on the 1938 play adaptation of Stephen Vincent Benét's 1936 short story "The Devil and Daniel Webster", (aka All That Money Can Buy).