Sunday, Ten, 8.30pm
Elementary gets all scientific and anthropological on us tonight. The episode is titled “Dead Clade Walking”, which while a pun on series Dead Man Walking, is also a scientific term referring to a group of organisms that survive extinction, onlynly to become extinct a few million years later. Iff that doesn’t confuse you enough, the presence of dinosaur remains should. It all begins when Joan (Lucy Liu, right) revisits one of Sherlock’s (Jonny Lee Miller) cold cases, discovering an unsolved murder is connected to a rare prehistoric fossil. Go figure. Meanwhile, Sherlock’s duties as Randy’s (Stephen Tyrone Williams) sponsor cross his personal boundaries.