Cold Fusion: Part 1 (S05E11)

A murder case that Spencer worked on whilst a policeman at the Atomic Energy Commission is under review. DNA evidence that has been unusable until now looks set to reveal the murderer of two anti nuclear campaigners in the 1980s. And it turns out not to be the man convicted of their deaths twenty years earlier. But someone inside the team is making every effort to destroy the new evidence. (iTunes)