Seventeen years ago, Zoe prosecuted the kidnapper and murderer Jason Wilkie and Cal Lightman helped the accusation to convict in one of their first cases. Now, Jason will be executed, and Zoe and Cal are part of the audience that is witnessing. Jason says something in Latin and claims that he did not kill the child to the public. Cal sees truth in his look and questions whether he helped to convict an innocent man. Out of the blue, the Sheridan family receives a phone call identical to the one they received when their nephew was murdered, and they find that their older son, Oliver Sheridan, is missing. Ben Reynolds uses an FBI device and verify that the voice is the same. Now Cal is revisiting the evidence of the case, and the result may damage the reputation of and close The Lightman Group since Jason's brother, Kevin Wilkie, is threatening to process Cal.
"Pied Piper" is one of the best last episodes of "Lie to Me". The plot is well developed and resolved, with good twists. Loker looking for a job when the situation is critical is a funny moment of the show. My vote is eight.
Title (Brazil): "Pied Piper"