Q.E.D. (1982)
Return of the Bloodsuckers
S18 • E9 Sep 4, 1996
Despite its unpleasant image, the leech has made a remarkable comeback to the modern operating theatres of hospitals around the world. Moreover, Dr Roy Sawyer , who runs the world 's first leech farm in Wales, believes that these bloodsuckers' saliva could hold the key to the treatment of heart attack and stroke victims.