Illusion

Trivia Contributor
Oscar Hsu made his first appearance on Fu in this episode. He would later return portraying Detective Roger Chin.
Monica Sztybel
The extra was there again, playing the drug buyer's henchman.
Monica Sztybel
Script differences  
The scene at the precinct in the tease was not in the script. That starts the tease with Peter catching up with Caine on the street. In fact, it starts with Peter driving around looking for Caine and spotting him, then running up to talk.
Monica Sztybel
There's more dialog between Peter and the Feds as they're discussing why Caine has been asked to go undercover. The Feds make snide hints about what this nightclub is like. Peter and Caine are suspicious, but clueless.
Monica Sztybel
A lot of descriptions of Peter's reactions to Lu Mah's discovery that Caine is Shaolin. When Caine catches the glass the script describes Peter as he "whitens, hand slides inside coat, ready to draw his pistol if necessary." Later on the description reads: "Peter tries to keephimself from freaking out as Bogard steps up to him, furious." Then, after Bogard snaps at Peter it says: "Peter tries to think, tries to stay calm as Bogart looks him in the eye."
Monica Sztybel
The script has more going on with the DEA and Peter, as Caine tries to save Connie in the storage facility (or warehouse). There's a whole scene where Peter forcibly prevents the DEA agents from crashing upon the scene and risking his father's life, and it's done with reason, not violence. Peter: "You wanna push it? Go ahead! But you're not goin' in there 'til I know what you're gonna do. Now do you know or don't you?" They don't.
Monica Sztybel
In the script, rather than the simultaneous fight, Peter watches his father losing his battle with Lu Mah. He's hesitant, stunned by the sight. Bogart is pressing him to make a decision to act on it or not.

I think Caine wins in the end, but I don't have that page of the script.
Monica Sztybel