Richard Lowery Jr. hired Nicole Moses as a last-minute replacement after Lucy Turner suffered a severe allergic reaction to the cat on-set.
Treppenwitz is German for "elevator joke". It's a reference to witty lines thought up too late to be useful.
Science Boy's claim to be "Prince Tafka" is a reference to when Prince changed his name to an unpronouncable symbol. TAFKA is short for The Artist Formerly Known As.