The film neatly combines police procedural with conspiracy thriller. Heston's scenes are counterpointed by more elegiac ones in which the centenarian Edward G Robinson as his friend Sol broods on the world he has outlived--his death in a euthanasia chamber is a gloriously lachrymose moment, which he plays to the hilt. Heston, too, is good as Thorn, a morally equivocal cop who loots the apartments of the victims whose deaths he investigates--he's a man just getting by in an impossible world.

On the DVD: Soylent Green on disc comes with a commentary from director Richard Fleischer, the highpoint of which is a memorable description of what it was like to work with the brilliant ailing, entirely deaf Robinson. He is joined by Leigh Taylor-Young whose work on the film as heroine led to years of serious environmentalist commitment. It has a useful contemporary making-of documentary and touching shots of Robinson's 100th birthday party with telegrams from Sinatra and others. The feature itself is presented in anamorphic widescreen with its original mono sound. --Roz Kaveney