Cancellation Fee is the 19th episode of Season 1. It aired on April 10, 2014.
Carol forgets a dentist appointment and fakes an injury to explain her tardiness when she finally arrives, but the receptionist hits her with a cancellation fee anyway. When the dentist, Dr. Sonya Vega, later has to postpone Carol's appointment, Carol demands her fee back. After the receptionist won't comply, Carol puts Dr. Vega on her growing boycott list. The only problem is that Nathan has made a date with Sonya.