Synopsis

Alan, Maria’s father (played by Joseph Millson), has been transformed into stone. The alien talisman is now in the Gorgon’s possession, along with her malevolent nuns, who are poised to open a gateway to their own realm. Can Sarah Jane (Elisabeth Sladen) and her young companions reverse the petrification of Alan, prevent the nuns from unleashing further, more dangerous extraterrestrials upon Earth, and evade the Gorgon's deadly gaze?