The team investigates the hit-and-run death of one of Flynn's old cases, and Brenda works on her political skills when it turns out the case may lead to a Hollywood director and his wife.
Nancy sees something she shouldn't have when she follows a secret tunnel; Dean takes a new job and leaves Isabel to live with Celia; Doug falls for a vision of beauty on the beach.
Three teenagers from the Pai Zhug Kung Fu Academy are chosen to fight the forces of an opposing academy and all other forces of evil.
When Natsume Takashi inherits a book that belonged to his late grandmother he realizes the book is filled with the names of spirits she defeated and bound to her will. He then decides to return their names so they can be free once again.
Adventures of a teenage pop star who keeps her identity secret from even her closest friends by using a disguise on-stage.
In an attempt to make Riley jealous, Alex brings a mannequin to life.
Along with the rest of the First Marine Division, Bravo busts north towards Nasiriyah, where their sister company Alpha gets its first taste of combat in a skirmish with Iraqi forces at a bridge outside the city. Prompted by an anxious Major General Mattis, Ferrando orders Bravo to cross the Euphrates the next night, but they end up entering Nasiriyah by day, driving through the city with minimal gunfire, save for an AK-47 assault by Platoon 3 leader "Captain America" McGraw on an empty car. Heading north to Mesopotamia -the "Cradle of Civilization"- "Bravo continues to lag behind other companies, partly because of a wrong turn ordered by its commander, Cpt. "Encino Man" Schwetje, who blames it on Colbert. Chomping at the bit while others are carrying the fight, the platoon finally gets "lit up" in a violent but successful skirmish in Al Gharraf, during which Trombley scores his first kill. Elated and relatively unscathed, the platoon celebrates its triumph, despite Sgt. Maj. Sixta's refrain to "maintain the grooming standard" and shave off all mustaches. Reflecting on the day's successes, Ferrando admits his biggest fear isn't fighting the Iraqis, but doing something his general won't like. For one night, he'll have no such fear.
When celebrity illusionist Miles Stone disappears from his own stunt, Goren and Eames must explore the exclusive and very secretive world of magic and magicians in order to unravel the mystery.
The Monarch gets word that Dr. Venture and Brock are at a science conference, and decides to launch an attack on the Venture compound.
Donald Ferguson, who's under Mary's watch, dies in a suspicious car accident and it is up to Mary and Marshall to find out if it was just an accident or if it has something to do with the O'Connor family from his old life when he was known as Donald Fraser. Meanwhile, Brandi continues to flirt with Raphael despite Jinx warning her not to.
Two Plumber offspring are taking down all aliens. Now they have their sites set on Ben's team, forcing the team to fight two of Ben's old alien forms - Four Arms and XLR8.
A veteran Detective Chief Inspector and his young Sergeant investigate murders around the regional community of Midsomer County.
London doesn't make the cheer-leading squad, so Cody helps out by forming a new cheer-leading squad with his misfit friends. Zack has his own problems on the basketball team.
Sally is disappointed in Derek when he refuses to help out at Marti's birthday party; Casey asks Max if he wants to get back together.
Sokka, Suki, and Toph try to stop the Fire Nation's air fleet. Meanwhile, Zuko and Azula duel in an Agni Kai and Aang confronts the Fire Lord. On the verge of losing, Aang gets hit in the back of his scar which sends him into the Avatar State.
While on the island, Aang seeks guidance from his past lives, but is not pleased with what he is told. The island, in fact, turns out to be a lion turtle from which Aang is given the guidance he had been seeking. After the tracker is unable to track Aang, the rest of the group decide they must find Iroh. Meanwhile, while tracking down Iroh, the group meets up with The Order of the White Lotus, a group that transcends the division of the four nations. After a discussion with Iroh the team decides to split up: Sokka, Suki, and Toph head to stop the Fire Nation's air fleet, the masters head to reclaim Ba Sing Se, and Katara, Zuko, and Appa head to defeat Azula.
Aang struggles to decide whether or not he has to kill the Fire Lord and, during the night, is drawn toward an island which disappears before morning. Zuko leads the rest of the group to the Earth Kingdom to meet a tracker whom they hope can find Aang. The Fire Lord crowns himself Phoenix King and Aang awakens on the island not knowing where he is.
Aang defeats the Fire Lord by bending the elements within the Fire Lord and removing his fire bending abilities. After Zuko is taken down protecting Katara from Azula, Katara fights and manages to restrain Azula. Afterwards, Zuko is crowned Fire Lord and promises a better future for the world. Aang takes his place as the next Avatar, changing his attire in the process. Katara finally shows her love for Aang as they kiss in the last scene.
When a mysterious alien organism takes Dr. Jennifer Keller as its host, the newly revived Dr. Carson Beckett and the crew desperately search for a serum to save her from the evolving intruder before it can infiltrate Atlantis. In the meantime, Richard Woolsey officially joins the team, having been chosen as Colonel Samantha Carter's replacement to lead the Atlantis expedition.