Alex's life hangs in the balance after being shot by a criminal during her friend's wedding. The Rangers track down the team who attacked during the wedding. Walker keeps remembering how much Alex means to him.
A relative of Carlos Sandoval is falsely arrested for a crime and sent to prison. Alex and Walker prove his innocence, but before Hector is released, he witnesses a guard kill another prisoner who wants to blow the whistle on wrong-doing.
A criminal Walker arrested years ago is released from prison. But once out, goes back to a life of crime. Trivette goes undercover to infiltrate his gang and get evidence to arrest him again. Alex and Carlos help a teen stay out of gangs.
A company is dumping pollutants into the river where Indians children swim. The children start dying. A group of Cherokees decide to solve the problem themselves. The Rangers work with Sheriff Sam Coyote to find the evidence of the dumping.
A group of Satanic believers starts kidnapping children a week before Halloween so they can sacrifice them on the 31st. When Alex tries to protect a child, she is also taken. The Rangers, Carlos and Trent track down the group.
While hiking in the Colorado mountains, Alex is kidnapped by a trio of mountain men, who force her to their backwoods cabin. Walker, Trivette, Sandoval, and Malloy follow their trail through the mountains, determined to get her back. When they reach the brothers' cabin, Alex finds out she's not the only woman that has been stolen by the crazed mountaineers.
A former member of the IRA brings his daughter to Dallas for medical treatment. However, Irish radicals follow them to Texas to kidnap the girl and force the father to help. The Rangers must find the girl before she dies from her illness.
Country singer Lila McCann stars as Kelly Wyman, an aspiring country singer. One of the many obstacles this precocious teen-ager faces is a slick-talking talent agent, who is the mastermind behind a drug cartel that Walker is trying to bring down.
A young truck driver refuses to transport illegal drugs for a corrupt sheriff. The sheriff places a bomb on the driver's truck; the young man survives and goes into hiding. The boy's mother asks the Rangers to look into the matter.
Carlos' nephew Jesse is accused of killing a cop during a drug raid since the murder weapon is found in Jesse's possession. The gun was left in Jesse's care by one of his friends, and Jesse is forced to take the blame to protect his mother.
A high school principal reaches out to Walker when his school is overrun by drugs. It appears to be an inside job as the students always know when there is a raid. When the principal finds the leader, he is killed.
The Cherokee Indian racing team is experiencing a lot of problems with their cars and drivers. A rival team wants to make sure the Cherokee do not win the races. Meanwhile, a young girl is kidnapped so Trent and Carlos search for her.
Models are being kidnapped to be sold in a sex-slavery auction. Trivette's girlfriend is the most recent disappearance. The Rangers must find where the models are being held before the sale is finished.
A crime lord named Caleb Hooks, whom Walker helped put in prison several years ago, escapes from prison, hell bent on revenge against the Texas Rangers (because Hooks' brother had been shot and killed during a shootout, and he claims it was murder). Hooks initiates his plan by having Alex and Trivette kidnapped, then placed in a huge tank full of freezing, running water. Hooks then contacts Walker and begins playing cryptic games with Walker, in hopes of both luring his sworn enemy into a death trap of his own and stalling Walker in his efforts to rescue his friends ...
When Maisie Whitman's son dies unexpectedly, CD tries to determine if he was murdered. He notices that his friend Maisie is having problems with her mind. Meanwhile, the Rangers try to track down an escaped convict.
In a law enforcement contest for shooting, strength, and endurance, Walker and Trevette find their matches in law officers from Germany. A preacher's son owes money to a loan shark who tells the son to steal money from his father's charity.
A young boy is upset that his fireman father never seems to be home. The firemen are busy because a gang is torching homes of witnesses to the gang leader who is on trial for murder. The father is shot as he attempts to put out a fire.
Masked men kill members of a wealthy family and film the murder. They use the video to extort money from other wealthy families. Walker and Alex use the governor's plane to fly evidence to the court. Their plane is shot down.