Dark Vision

Trivia Contributor
Faux pas in this episode is having Skalany in the flashback to the precinct 10 years prior. In Rain's Only Friend she's introduced as a new cop. And Peter is the one breaking *her* in. Also, Eppy was his first partner, not Broderick.
 Monica Sztybel
Script differences  
The tease has a little more dialog. Peter's comments about the orphanage are not interrupted right away.

Caine: "And you consider this reunion a step onto a path leading you back into darkness?"
Peter: "I've got good memories of the orphanage. I really do. Friends like Kyle. Meeting Blaisdell. But there were the silences. The long nights. The faces of strangers."
Caine: "But they are no longer strangers."
Peter: "Yes, they are. They always will be. I'm not sure I can face those empty hellos, and the small talk, the lives that didn't go where the guys had hoped they would."
Caine: (softer) "Yours also?"
Peter: "I'm one of the lucky ones. Thanks to Blaisdell. And finding you again. But I..."

Here is where he has the vision.

Instead of Morgan in the hall, it's a cop named Cross. He's all business, but - like Morgan - he knows Peter and lets him through.
 Monica Sztybel
When Simms inquires about Peter keeping his radio on off duty, he says, "I like to know that crime hasn't stopped while I'm away. Makes me feel like I've got a job to come back to. Excuse us, we're late for a reunion."
 Monica Sztybel
After Caine leaves there is more to the scene.

Simms: (sotto to TJ) "It's your case. You can deal with the press. Keep the words 'serial killer' out of your vocabulary, TJ. Sorry, don't call you TJ."
She moves past him as Sandra Mason thrusts a microphone into TJ's face.
Sandra: "Sandra Mason, Channel Three Action News. We understand a strangled doll was found in the likeness of the dead man. Are we dealing with a psycho killer, Detective?"

There is no description of TJ's reaction to this.
 Monica Sztybel
The script still has the bar setting as Chandlers.
 Monica Sztybel
Instead of Robert Mitchum, Peter says Dick Powell. He also describes him a little more, "...complete with fedora, fifth of Johnnie Walker and well-turned cynical one-liners."
 Monica Sztybel
Int he script, the corridor that Caine walks down (and later with Peter) is described as the police academy, rather than a corridor in Peter's mind.

When Caine opens the first door he sees young Peter, from the temple, turning with a knife in his hand. There is blood on the knife, but no victim.

Young Peter: (screaming) "Get out of here! Now!"
Caine: "Peter..."
Young Peter: "You are not my father anymore!"

The second and third doors are the same as in the episode.
 Monica Sztybel
The club that Kerri (the dancer victim) works in is a strip joint in the script. She is on stage instead of just dancing in the crowd. When she leaves the stage, she finds refuge in the dressing room. It's there that she is attacked.
 Monica Sztybel
When Peter stops by the club to talk to Candy, he sits at a table in front of the stage. She comes over to him to do a table dance.

Candy: "Bobby says you're a cop. How much do you want me to take off?"
Peter: "I've got a weak heart. Give me a break. Tell me about Kerrie."

Candy is dancing, telling Peter she didn't know Kerrie that well, kept quiet about her boyfriend. She tells Peter to talk to Angel. She tells Peter that Angel is a cop and gives him her real name.

She's naked by the time she's finished. The camera only shows her bare back.

Peter: "I thought you weren't going to stop my heart."
Candy: "Couldn't help myself. Too bad you're not an agent or a producer. But I know that. Too wholesome." (glancing past him) "Oh my God! He came back!" (Peter turns to follow her gaze) "He was here almost every night. Watching Kerrie." Peter jumps to his feet.

Peter sees the killer through the crowd in the bar. "The killer (whom we see fully for the first time) locks eyes with Peter. Peter catches his breath, "hand instinctively going for his gun." He has subliminal images floating in his mind of the nightmares he's had. He loses sight of the killer, and goes chasing after him. But he lost him.
 Monica Sztybel
When Jody describes Peter's mood to Caine, she says, "I'd never seen him so disturbed. Not even when he'd lost Rebecca and was accused of her murder."
 Monica Sztybel
When Caine says Peter relates the killer's pain to his own fears, Caine adds, "I fear..."

Jody: "I can't see you ever fearing anything."
Caine: "I fear for Peter's..."
Jody: "Safety?"
Caine: "Sanity."
 Monica Sztybel
When Blake tells Jody about the frantic wife, she says, "_You_ got the call?"
Blake: "Broderick's running short on detectives. You know what I'm like in the field. I need backup."
 Monica Sztybel
At Chandlers, Instead of Skalany it's Sandra Mason who approaches Peter. She asks him for answers off the record, since Commissioner Kincaid has asked for a press blackout. Peter refuses.
She mentions now he saved her life once, and that she thought they had developed a special relationship. Peter says, "So special favors. We can talk about relationships another time. If this is a serial killer, you'll be the first to know."

This is when TJ walks in.
 Monica Sztybel
In the scene where Caine and Peter link their chi to find the truth, Lo Si is there. He tells them that they must make the journey together without him. "Father and son. Become as one."

As they drift into meditation, we see clips of young Peter at the temple, Tan, the destruction, young Peter at the orphanage, Blasidell.

Caine: "After the temple, the orphanage. Then..." Peter: "The Police Academy..."

In the tag, there's no chat with Dr. Harmon at Chandlers. When Peter asks Simms if she's going to Les Miserables, she says "Phantom of the Opera" instead of "Tommy."
  
When Jody says that Peter would have been the last victim, Peter says (softer), "And the next vision I would have seen would have been my own death."
 Monica Sztybel
The episode ends with Caine's line "A mime told me." No mention of a dancer. Peter and Caine wrap their arms around each other and keep walking.
 Monica Sztybel