Dirk Gently's Holistic Detective Agency

An eccentric private detective who believes in the fundamental interconnectedness of all things.

A computer programmer and former Cambridge student who is drawn into Dirk's investigation after a murder and a string of odd events.

Known as Reg, an elderly Cambridge professor and Richard's former tutor with a mysterious past.

Richard's girlfriend and the sister of his employer, Gordon.

Susan's brother and Richard's boss, whose death sets the mystery in motion.