Star Trek: Year Four - The Enterprise Experiment is a five part comics miniseries published by IDW Publishing beginning April 2008. The series is written by D.C. Fontana and Derek Chester with art by Gordon Purcell, and continues the voyages of the USS Enterprise after the events of the Year Four miniseries. The series is a sequel to the episode "The Enterprise Incident", featuring Federation experimentation with the captured cloaking device and appearances from the Romulans and in later issues of the series the Klingons. Arex also appears in the series.