Walker always seems to be just one step behind a vigilante, who gets the jump on the men Walker's supposed to arrest and takes the law into his own hands.

There's a reunion of former Texas Rangers and there's a shooting competition with cops from all over the country coming to take part in. An old friend of Alex's, a Senator who is rumored to be running for President is also in town. A retired Ranger and friend of Walker's is also in town and is looking for a man whom he believes is involved in the killing of a cop in another city. When Walker learns of this, he thinks the man is some kind of Black cop who faked his death is now a gun for hire. The group whom he is with is in town to do a job and the one in charge killed a cop who was coming for the competition and assumed his identity. Eventually, they learn that they're in town to kill the Senator.

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.

A group of cops execute criminals that beat the justice system. After a few murders, the Rangers figure out the pattern and try to track down the bad cops. When an innocent person is killed, Walker makes it his job to stop the group.

When a friend of Walker's who is a Reverend dies, his son, Trent who's one of Walker's students who 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 Carlos, a friend of Trent's

Carlos is working undercover to get an elusive drug dealer known as El Vaquero. He's gained the confidence of his number two Johnny Primo. Walker wants them to bust Johnny and maybe he can lead them to El Vaquero. But Carlos wants to stay under, it seems that El Vaquero killed Carlos's brother, who was an addict/dealer who wanted to quit but died of an overdose. Carlos thinks El Vaquero had him killed. Walker says ok but Johnny learns Carlos is a cop and grabs him and beats him up to know what he has told.