When corpses are found with internal organs missing, Liz Shaw and P.R.O.B.E. investigate a defunct government project from the 1970s that aimed to predict the course of human evolution. But was the creature it produced really destroyed, or has it resurfaced twenty years on?
P.R.O.B.E.: Unnatural Selection
A series of gruesome and bizarre murders leads P.R.O.B.E. to investigate a secret government project from the seventies.
