Avsnitt 4

Murphy goes undercover at a defence biotech contractor that may be covering up an industrial accident. Specifically, a young child is found to have drowned but the mother believes he died as a result of a chemical agent in the pond near where the child was playing. Despite being warned off the case, the police leave Murphy in place . When the family who helped the dead boy and his mother is executed, it becomes apparent that someone will stop at nothing to keep these secrets hidden.