Season 1

During a bank robbery in Dallas, Walker's partner is killed. Trying to solve this case, Walker finds out that this raid could have been only a test for a much bigger goal: simultaneously robbing four banks lying next to each other. No one believes him. After a bomb explodes in a far away bank, which has just gotten a valuable load, everyone goes there. When the actual raid starts Walker must face the gang alone.

Walker must help Alex when she is stalked by an ex-convict whom she convicted back in the day.

When a powerful Japanese Yazuka is killed by Congressman Cabe's assistant, the Yazuka come to America, seeking revenge, and Walker and Trivette are assigned to protect the congressman.