Showdown at Casa Diablo, Part I

Alex and Walker survive the plane being shot down, but the killers track them where they landed. Search teams try to find Alex and Walker and must get to them before they are killed and before the court case is dismissed without evidence.

Terrorists plan an urban release of anthrax in 48 hours, sending Walker and Trivette into action to stop them. They recruit Rangers Francis Gage and Sydney Cooke to help.

When an accountant dares to speak out against his former boss, a notorious crook who is known to Walker, it is up to new Rangers Gage and Sydney to shield the man and his family from the wrath of the criminal world.

A Shaman transports Walker back in time 100 years to prove the innocence of a Comanche Indian. In the present, Walker must prove the innocence of another Comanche, who is accused of murder.

Gage's sister is a reporter. She goes undercover to investigate a crime boss operating at a local bar. When she goes missing, Gage and Sydney go undercover to find her. Meanwhile, Walker and Alex go on a camping trip.

Loretta Lynn's daughters play themselves as a country singing group. The Lynn Sisters are kidnapped and forced to record their music for a bootleg music mongrel.

An undercover cop is killed by the crime boss he was investigating. The deaf daughter of an Elvis impersonator saw the murder and is now in danger from the killer.

The HOPE Center hosts a charity rodeo to raise money. During practice, a man sexually harasses a woman; Trivette rescues her, but the man is accidentally killed by his own hand. The dead man's father decides that Trivette must die.

Walker goes undercover in a Arkansas prison to expose a warden money making fights.

Sydney poses as a singer to investigate a corrupt club owner, while Walker seeks to end the conditions that led to a middle-schooler's suicide.

An employee at a research facility realizes his company is making sarin nerve gas and plans to release it. The man asks his brother Danny to help collect evidence for the police. They are caught; the man is killed and Danny hit by a car.

Men dressed as Santa's rob the armored trucks picking up donations from Santa bell ringers. Gang members rob a church where former gang members attend, causing the church goers to get in contact with their gang again.

A criminal whose operations Walker and the others have been foiling decides to take them out, so has one of his men plant a bomb when they're all together.

A retired Texas Ranger joins Walker in the pursuit of those who shot his daughter during a jewelry store robbery.

After a powerful laser is stolen, Walker hunts down the thieves to discover they have subsequently had it stolen from them.

Trivette is giving a criminology lecture at the University. Afterwards, one of the students asks Trivette to help her prove that her father is innocent of a crime he was convicted of.

Sammo Law is in Dallas to help Walker stop a racist organization from implementing a plan of ethnic cleansing.

A Chinese diplomat who is a friend of Walker's is in the country to bring some students to his country. Later when one of Chinese Embassy staff turns up dead Walker and the others investigate. 

Dallas prepares for a ceremony to promote unity among the races. A white supremacist group goes to Dallas with the intent of placing bombs to destroy the unity. Gage takes a young boy under his wing to keep him from joining a gang.

When Detective Steven Nimh who infiltrated the organization of Billy Lo and has given Walker very useful information about Lo's operations. Walker feeling that Lo might be suspecting that he has a mole in his organization wants Nimh to pull out.

Walker has been able to intercept all the drug shipments of the Ortega brothers. But when they discover that Walker has an informant in their midsts, they kill the informant.

Walker, Trivette, and Gage go to Mexico to rescue Alex and Sydney. They work their way across the Mexican countryside to Casa Diablo. In the ensuing showdown, the drug lord and his brother are both killed.

Walker, Trivette and Gage go to Walker's bachelor party in the woods when Gage is attacked by a bear

As the wedding of Walker and Alex takes place, a killer is hired to kill them

Just as Walker and Alex are about to go on their honeymoon, the assassin who was hired to kill Alex and whose partner Walker killed, sets out to get them. And he's determined to do it. Even if he has to bring down the plane they're on.