An investigation into the theft of a state-of-the-art military helicopter for use in the drug trade leads Walker to a former fellow Marine Corps officer, who abandoned his unit 25 years ago in Vietnam.

Walker and Trivette are in the midst of investigating a trio of college students who use Rohypnol to subdue unsuspecting female victims in night clubs, when their friend, Darcy Reynolds, is raped on her 21st birthday. After another one of their victims is killed, the trio become willing to try anything to shake the Rangers.

Eight years earlier, a bank robbery resulted in the sheriff's death, and criminals escape in a small plane. Current day, the plane is found crashed in Utah's Rocky Mountains. Walker and Alex investigate, riding into the rough wilderness.

Alex, C.D., and a group of fifth and sixth grade students from a Dallas elementary school are kidnapped by mercenaries, who demand $10 million in ransom. To ensure their demands are met, they trap the victims in the school bus, park it in a landfill, and cover it with mud. Walker and Trivette race against the clock to save them and capture the criminals - also well aware of a deadly storm system with a history of spawning deadly tornadoes.

Walker's friend, Father Blake, is besieged by a ruthless developer who plans to build shoddy condominiums on the same site that he has announced plans to build a shelter for the homeless. The developer's cronies assault Blake, but a down-on-his-luck veteran and his faithful canine companion, Lucky, witness the crime. "Soldier" goes into hiding, so it is up to Lucky to aid Walker in his search for witness and help derail the developer's crooked plans.

An assassin is in Dallas to kill an ambassador. A Russian agent who has been tracking him for 25 years asks Walker to help with the capture and prevent the murder.

Walker tells children a Christmas story about a Texas Ranger from 1876. Hayes Cooper was said to have no Christmas spirit. In 1876, a baby was kidnapped, and Cooper was assigned to the case. At last, he found the baby and Christmas spirit.

Walker transports a mob accountant on a plane so he can testify in court. The mob leader wants him dead, so he causes the plane to crash. Walker and the survivors must find their way from the crash site to safety while the mob chases them.

The Rangers and friends take troubled children to C.D.'s ranch for a weekend camping trip. Brooks is there for community service. One boy takes money from a drug dealer at a restaurant, and now the criminals are after them.

A friend of Walker's is a kickboxing champion who is being pressured by a former one who lost the title due to steroids. He tries to plant drugs on Walker's friend, and then tries murder.

A Texas Ranger is killed in the line of duty. Two officers apply for the open position. Both are almost equally skilled. One is being hunted by her violent ex-husband, and she thinks about dropping out of the application process.

High school athletes are being coaxed to take a hybrid steroid called Powerballs to enhance their sporting skills. However, it takes over their brains and makes them oblivious to danger, causing them to die.

The criminal who killed Walker's fiancé ten years earlier is being released from prison early. He intends to seek revenge on Walker for putting him away by hurting all of his friends.

LaRue returns. This time, he has a court hearing to determine his sanity. He wrestles a gun from the bailiff and takes over the court, killing people at whim. He waits for Walker to come so he can kill him too.

A jaded dragon with a mystical past is stolen by a Chinese gang, believing it really has magical powers. A young man steals it from them, thinking it will heal his sister who is in a coma.

A man campaigns to remove the gangs from his neighborhood by using violence against them. It gets worse when his granddaughter is shot in a drive-by. Walker helps him see that violence is not the answer.

The newly appointed 99th Ranger goes undercover as a teacher for a mob boss' son. She is there to collect evidence against the mob boss, but realizes she has to help his son away from him too.

When a friend of Walker's, who is a reverend, dies, his son, Trent, who's one of Walker's students and has been an instructor at the Army returns home. He is uncertain of what he's going to do. He doesn't exactly want to be like his father and would like to help people like Walker but doesn't want to carry a firearm. At the same time someone is killing cops and Walker is wondering why. And among his targets is Trent's friend, Carlos.

When a friend of Walker's, who is a reverend, dies, his son, Trent, who's one of Walker's students and has been an instructor at the Army returns home. He is uncertain of what he's going to do. He doesn't exactly want to be like his father and would like to help people like Walker but doesn't want to carry a firearm. At the same time someone is killing cops and Walker is wondering why. And among his targets is Trent's friend, Carlos.

Alex wakes up in the morning and finds a gun in her hand and a dead man beside her. Realizing she was framed, the Rangers investigate. Her father comes to town to defend her.

Joey Prado, the professional kickboxer whom Walker trained and helped when he was in trouble, has just graduated from the police academy. And he gets an assignment which has him going undercover to get a guy he knew who is now a drug dealer, who has plans to give drugs away. And the guilt of deceiving the guy gets to Joey.

An undercover agent is killed by Jack Garrett, the man she was working on. Walker sends an informant to get him to incriminate himself but before he could someone tries to kill him. Walker stops him and discovers that he's the brother of the agent who was killed. He refuses to cooperate, insisting that this is between him and Garrett. Later he escapes with help from his brother and sister and tries to get Garrett. Walker tries to stop them.

A for-hire explosive expert is hurt in one of his own explosions. The Rangers learn he was hired for a local job, and they want to find the man who did so. The Rangers ask Charlie Brooks to play the Iceman due to a resemblance.

The Rangers bust up a drug operation. While the leader and his sick girlfriend escape, their son is found locked in a closet where he was forced to live. Walker takes him under his wings to give him a life while tracking his parents.

With Walker's help, Lucas starts to live life fully. Walker finds out that he has AIDS and will die soon. The Rangers find his mother who is also dying of AIDS. His father is captured.

C.D. goes undercover in a senior nursing home where the elderly are dying at a fast rate. He learns that the doctors are testing Alzheimer drugs on them and that they are dying from drug reactions. He finds himself on the list to be tested.

Walker is taking some kids on a tour of the Texas Ranger Hall of Fame. When one of them asks him to tell them about a Ranger, he chooses to talk about Hayes Cooper. It begins in the old West. Cooper is a bounty hunter and after getting his latest bounty, he finds some settlers who are being harassed by someone who wants their land. And he helps them.

Walker continues to tell the story of Hayes Cooper. And he continues at the part when Cooper, upon seeing the family he befriended killed, sets out to go after the ones he believes responsible for their deaths. After getting one of them, he meets a Texas Ranger who warns him about crossing the line and then gives him a Texas Ranger badge which he takes. After tracking down his quarries, he gets shot but is found by some Indians who nurse him back to health and give him a moment to think.

A boy with telepathic powers escapes from the laboratory he was living in since his mother supposedly died. He learns that she is alive, so he contacts Walker to ask for assistance. The doctors try to destroy evidence and kill witnesses.

Feeling that merely locking up criminals is not making a dent in the crime rate, Walker makes a proposal for new kind of reformatory before Senator Kay Hutchinson. The prison commissioner, who feels that it will jeopardize his plan to get more funds to build more prisons, opposes it. But Hutchinson gives Walker a shot. Deputy Commissioner Luther Dobbs is sent to evaluate his program. So 10 young first time offenders arrive at what is called Camp Justice. Walker makes some headway with some of them. But when one of them gets into it with one of the guards the program is in danger.