 The installment features guest appearances by Kirsten Nelson, Sage Brocklebank, Frank Whaley, and Nico McEown among others.The title refers to the song "Ghostbusters", written and performed by Ray Parker Jr.The series follows Shawn Spencer (James Roday) and his colleague and best friend Burton "Gus" Guster (Dulé Hill), who claim to operate a psychic detective agency; it is actually based on Shawn's hyperobservant ability.