Lethal Dose is a British horror film released in 2004. It was directed by Simon De Selva and Matthew McGuchan. This film begins when animal rights activists break into a research laboratory to rescue test animals. Gary (Ross McCall) gets his leg caught in a bear trap, and the other members of the group have to leave him behind. Gary is imprisoned and the animal rights group disbands. Danny (Leo Bill), a former member of the group, informs the others that Gary has volunteered for medical experiments to get a reduced sentence. The group reunites and locates the research complex where Gary is being held. The complex is abandoned and the rescue party finds itself locked in a maze of hallways and laboratories. They soon discover that an entity made of electricity inhabits the complex, which begins stalking them. The entity begins picking off victims one at a time as the surviving group members attempt to determine Gary's fate.