Laura Johnson, the actress who played Arnie Becker's date, was married to Harry Hamlin (Kuzak) at the time.
David Rappaport's character 'Hamilton Schuyler' is a reference to Alexander Hamilton and the Schuyler family- Alexander was married to Elizabeth Schuyler. Elizabeth's father, Philip Schuyler, was a prominent lawyer and politician- as was Alexander Hamilton.
The title refers to the 1900 children's book "The Wonderful Wizard of Oz" by L. Frank Baum and illustrated by W. W. Denslow.