A bus transporting female convicts is forced off the road and the ones who force it off the road are the partners of two of the convicts on the bus. They proceed to go on a crime spree. The other two are chained together and escape together. One of them claims to be innocent of the crime she was convicted of and tries to find her son. Her husband tries to find her so he can kill her. They eventually run into Gage who is on a bike ride.
Boomer Knight runs a youth center in a gang neighborhood to keep the children from joining the gangs. Walker helps him organize basketball tournaments. The drug dealers try to intervene by kidnapping Boomer.
Walker and the others are working on reports that the mob is making a move on Dallas and they are forcing criminals to turn their operations to them or else. At the same time his friend who owns a club, borrowed money from someone who works for the mob. And after he pays them, they insist that he give them ownership of the club. When the mob boss arrives, he tries to kill him but Walker stops him and they agree to work together to get them.
After a trial where a crime boss is found guilty, the head juror is killed. The Rangers connect the murder to the son of the convicted criminal. Others are in danger from the son's revenge for putting his father in prison.
Sydney and Gage go undercover to bust a biker gang that has been dealing drugs to illegally-licensed truck drivers; one of which caused a fatal highway accident that first alerts Walker and company to the operation.
While trying to prevent a crime, Gage is near an explosion. The intensity of the blast, damages his hearing. While they wait to see if his hearing returns, Walker and the others try to find the ones Gage tangled with. And they are also planning to take Gage out too.
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 ...
A show played largely for laughs (and with Walker not involved in the story; he has a few scenes checking in with Alex's obstetrician to try to find the sex of their upcoming baby): Trivette leads a group of Rangers backstage at Las Colinas Studios (and the actors' trailers for this show) to investigate skulduggery on a movie being filmed in Dallas.
Killer Lavocat breaks his gang members out of prison to help kill the Rangers he determines a threat to his life. Lavocat caused the death of CD, Jenson, and attempted to kill Trivette. A Hayes Cooper story parallels the modern day story.
Lavocat continues with plans to kill the Rangers. As the Hayes Cooper story unfolds, Hayes fights an ancestor of Lavocat. In current day, the Rangers go after Lavocat. Trivette and Erika are engaged for marriage. Alex gives birth to a girl.