A SEASON FINALE OF DEATH AND DISCOVERY — After helping rescue Max (Jason Behr) from the FBI, Sheriff Valenti (William Sadler) is stunned when he witnesses Michael’s (Brendan Fehr) powers and realizes that Michael, Isabel (Katherine Heigl) and Tess’ (guest star Emilie De Ravin) true alien identity. Max and Isabel finally use the orb-like communicators to receive a message from their real mother (guest star Genie Francis, “General Hospital”) about their past lives and future destiny — a destiny which does not seem to include Liz (Shiri Appleby), Maria (Majandra Delfino) or Alex (Colin Hanks), while unwittingly alerting hundreds of other aliens of their existence.