UNHAPPY CAMPERS - A new UFO sighting on the outskirts of Roswell re-ignites old fears and suspicions among the townspeople, just as the annual Roswell High Fathers' Camping Trip forces Max (Jason Behr), Isabel (Katherine Heigl), Liz (Shiri Appleby), Kyle (Nick Wechsler), Maria (Majandra Delfino) and Alex (Colin Hanks) to spend a tense wilderness weekend together. Meanwhile, River Dog (guest star Ned Romero) reappears to help Michael (Brendan Fehr) pursue the clues that this latest sighting may hold, and Sheriff Valenti (William Sadler) tries to repair important family relationships. Nick Marck directed the episode written by Thania St. John