When does Garth Marenghi's Darkplace return?

Garth Marenghi's Darkplace is a British horror parody television series created by Richard Ayoade and Matthew Holness for Channel 4 in the 1980s. The show focuses on fictional horror author Garth and his publisher Dean Learner. Within the reality of the show, Darkplace was produced in the 80s, but never broadcast anywhere but Peru, eventually becoming a lost series. In 2004, due to the "worst artistic drought in broadcast history", Channel 4 decided to air six of the original episodes.