Among the issues Walker has to deal with include a new partner named Trivette, a group of men terrorizing a circus family who camp out at his home, and some bad guys who plan on the ultimate bank caper.

The leaders of a money laundering operation at a bingo hall are captured and put on trial. The accountant is asked to testify against her bosses. Walker and Trivette have to take her to court, but she keeps escaping them for her own agenda.

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.

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

Walker tracks down crooked geneticists who have kidnapped an important scientist whose unique DNA is vital to their research in developing super-soldiers.

Drug dealers are being more active and brazen trying to sell their drugs. They target a high school and a teacher is killed when he tries to run the dealers off school grounds. The students decide they must take back their school.

An escaped convict embarks on a deadly pursuit to kill every person who was involved in his sentencing. His top target is the kind old judge who the convict intends to return the favor by executing.

Special Olympian athletes are in town for the competition. One girl makes friends with the Rangers and their friends. She witnesses a hit-man's attack on Trent to prevent him from testifying in court.

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.

Walker and Trivette receive a message from terrorists, who threaten to blow up enough anthrax to kill one million people in Dallas, if they don't receive $100,000,000 and the release of another terrorist from prison. It's a race against time as Walker and Trivette hunt for the bomb.

When a new weapon knows as a Thunderhawk is stolen, Walker tries to find it. What they don't know is that the man who was in charge of bringing it to the military was the one who stole it. He's planning to sell it to some people who plan to use it for terrorism. But before he could it's stolen from him.

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. Gage has a run in with the diplomat's son and because his father is a diplomat has diplomatic immunity. Gage is not pleased and thinks they should keep an eye on him. They later learn that the staff member may have been involved with drug smuggling. And that the diplomat's son is the one behind but because of his diplomatic immunity they can't touch him.

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

The end is near ... in a show told mostly in flashbacks, a wounded Walker ascends through a manufacturing plant, wounded and using his gun one bullet at a time on killers as he recounts the story of a visiting African businessman who collapses from an Ebola-like virus after infecting several people. The businessman, who has since died of the virus, was a pawn in an African diamond-smuggling ring. Now Walker has the diamonds and a whole cartel is in the building going after him. A "Dallas"-like twist ending keeps Walker going (this show and the one after it were doubled up on the same Saturday night after being postponed due to extremely low ratings).