Kai searches for a way to stop McCullough without sacrificing any of his friends. Uncle Six and Zan clash over control of the Triad.

Kai tries to stop McCullough from achieving his endgame as the five Wu pieces — fire, wood, earth, metal and water — inch ever closer to reuniting.

A botched restaurant order makes Kai a target of Triad members, who are unaware of his family connections — and his new status as the Wu Assassin.

As Kai begins his Wu Assassin training, more mundane concerns find him turning to Lu Xin for a favor. Jenny prepares for her exacting parents to visit.

Fists and fire fly as Kai and Uncle Six face off. Jenny and Tommy show the revamped restaurant to their parents. Lu Xin tangles with McCullough’s men.

A risky power play puts Uncle Six at Kai’s mercy. An unburdened Tommy attempts to get his life together. Zan makes her Triad ambitions known.

Trouble follows when Kai and Uncle Six hit the road to hunt down the Earth Wu, who happens to be conducting a search of his own.

Danny faces his fear, and Colleen meets her match. Joy makes a hasty decision while Ward struggles to accept his sister’s admiration.

The brother of a promising local boxer is murdered, and the chief suspect is the outspoken reigning champion opponent from the mainland.

The next case for the CSI’s gets even tougher when a paintball player turns out to be the prime suspect and later goes missing the team also has another problem…

The bizarre case of a man chopped in half baffles the CSIs, while Natalia’s injury puts her and Ryan in jeopardy.

Suspicious of an undercover venture involving a deal between corrupt cops and military personnel, Callen and Sam try to expose the illegal operation by posing as California highway patrol officers.