An undercover detective in Miami is captured by drug dealers when her cover is blown. Miami police ask Texas Ranges to help by going undercover as out-of-town dealers looking for drugs. They recuse the detective and break the drug ring.
Members of a high school football team are being blackmailed to throw an upcoming game. The team's coach is murdered when he learns of the blackmail. Walker and Trivette must break up the gambling ring before the state championship game.
It appears that Indian spirits are protecting Indian burial land. Witnesses report that spirits appear, frighten, and attack those who get in the way. Walker seeks help from the Indian Tribe to learn how to fight evil spirits.
A convict seeks forgiveness from those he did wrong. He contacts Walker and tells him that the person who killed Walker's parents is still alive. Walker tracks down the killer to have him finally get his punishment in court.
A well-liked woman in a small town is murdered, and townsfolk suspect a slow-minded man. The sheriff calls the Rangers to help prevent a lynching. Walker and Trivette must find the real killer before the angry town hangs the innocent man.
Walker and Alex go white water rafting and camping trip. In the morning, a rafter is found dead. The group continues rafting to the nearest station for help. Meanwhile, there is a prison outbreak and convicts are heading towards the rapids.
A former boyfriend of Alex is in trouble when a prison is released from jail, waiting for a new trial. The crime boss is killing the witnesses that put him in prison in the first place. Walker must save the witness so he can testify again.
An Irish peacemaker visits Texas to talk about a plan to unify Ireland. Irish militants attempt an assassination. One of the militants is captured and the rest of the team attempt a rescue as well as continue the assassination attempts.
When Victor Larue, the one who terrorized Alex is brought to trial. At the trial, he manages to get the bailiff's gun. He then demands that Walker come here but Walker is chasing someone else. So while they wait he and Alex talk about the time he held her captive.
A woman asks Alex to help her escape from her abusive husband. Alex's woman support group goes on a retreat for a few days, and have the women help each other. The husband finds out where they are, placing everyone in danger.
Walker working with the FBI busts an arms dealer. The man in charge pulls a gun and Walker shoots him and his dying words are for him to watch out for his brother. The brother who was out of the country training some mercenaries, upon learning of his brother's death, he takes his mercs and goes to Texas. Upon arriving he uses the FBI agent who worked with Walker to get him. He knocks him out and when Walker wakes up he tells Walker that he's going to have to take on each of his men who have been told to kill him.
Walker wakes up in a hotel room with a gun in his hand and a dead man on the floor. He cannot remember what happened nor who he is. A cocktail waitress from the hotel casino helps him escape the people trying to kill him.
When the Texas State Legislature is pondering budget cuts, Sen. Warren Hughes suggests disbanding the Texas Rangers ... unaware of a deadly plot an experienced jewel thief has planned for his daughter, Lindsey. When the thief hatches his plan and has Lindsey buried alive, it is up to Walker and Trivette to track down Lindsey's captors and where they have buried her before it is too late. In the process, Sen. Hughes learns just how vital the Rangers are to fighting crime.
The Texas Rangers ask the Russians for assistance in capturing a criminal the Russians had previously dealt with. A mild-mannered Russian shows up, pretending to be powerful. When they find the criminal, the Russian gets beaten up.
A family man hard-pressed for money is forced to help with a bank robbery. The robbery goes awry and the man returns to his family. As they prepare to leave town, the son falls into a sink hole. Walker and the others try to help the boy.
CD is inducted into the Ranger Hall of Fame. Meanwhile, the only case CD could not solve when he was a Texas Ranger comes back to haunt him. The Hangman is back to his old tricks. The Hangman taunts CD with calls about his killings.