Writer:	Melissa Rosenberg, Adam Armus, Hans Tobeason, Melissa Rosenberg, Adam Armus
Director:	Robert J. Wilson
Star:	Ian Abercrombie (Alfred Pennyworth),  Ashley Scott (Helena Kyle/ Huntress),  Rachel Skarsten (Dinah Lance),  Mia Sara (Dr. Harleen Quinzel/Harley Quinn),  Shemar Moore (Jesse Reese),  Dina Meyer (Barbara Gordon/ Oracle)
Recurring Role:	Shawn Christian (Wade Brixton)
Guest Star:	Robert Patrick Benedict (Gibson Kafka),  Steve Hytner (Dr. Franklin Rominic)

German title: "Harley Quinn" (edit) The jacket that Dina Meyer (Barbara Gordon) wears is the same one that Ashley Scott (Helena Kyle) wore in "Primal Scream." (edit) The metahuman who is fried by psycho doctor with his machine, is played by the Co-Executive Producer and Writer, Hans Tobeason. (edit) This episode (series finale) ends with Alfred speaking to 'Master Bruce' on the telephone, letting the audience know that Batman checks in on his only daughter. (edit) The song playing at the end of the episode's fight scene is titled "All The Things She Said" by t.A.T.u. (edit)

(Jesse sees the Birds' lair)
Jesse: Nice crib.
Dinah: We like to call it home. (edit) Helena: Maybe I'm not Batman's little girl any more. Sometimes I feel like he's watching, looking over my shoulder, looking down on all of us.
Dinah: Kinda like a big guardian bat. (edit) Barbara: Stay back, Helena.
Helena: Barbara, listen to me.
Barbara: There's nothing left to say.
Helena: Yes there is. You have saved me so many times it's my turn. When my mom died you told me something I didn't understand until right now. You told me revenge might dull the pain, but the less we felt the less we were.
Barbara: It was a lie.
Helena: No it wasn't. Barbara, this is my last chance to get forgiveness for what I did. If I could give my life to have Wade back, you know I would. But I can't... Barbara, we don't kill. No matter what. I can't let you do this. It makes us less... It makes us less. (edit) Harley: Tell me something Helena; why didn't just kill Barbara?
Helena: Kill her? ...I don't know.
Gibson: Superheroes don't kill, no matter how hard they hit their Barbara. Shhpow! Incoming headless best friend!
Helena: Maybe it's because you didn't tell me to.
Harley: An oversight on my part, which we'll soon remedy. (edit) Helena: Barbara knows.
Harley: What happened?
Helena: I hit her. Hard.
Harley: That would tend to give it away. (edit)

During the fight between Barbara and Helena, when Helena says "Sorry. I gotta kill you now" a tongue stud or barbell is clearly, if briefly, visible. It's also very visible when Helena is being interrogated by Harley in the clocktower. (edit) Trivia: At the end of the episode when Reese and Alfred are sweeping up, a Batgirl figure is seen lying on the ground and sweeped away. (edit) After Oracle figures out what happened to Helena, she only tells Dinah that Helena is "compromised." Dinah somehow immediately knows and mentions she is hypnotized. (edit) Dinah's hair is curled in the episode, but when you see her fighting from the side/back in the fight scene at the end, her hair is no longer curled. In other words, Rachel's stunt double didn't have the same hairstyle. (edit) In the fight scene between Helena and Harley, Harley flips to kick Helena and Helena stops her. Then after they cut to Dinah and back to Helena and Harley, the same scene is shown again. (edit)

Harleen: What's the matter - bat got your tongue?
Alluding to the expression, "Cat got your tongue?" (edit) Barbara: She's the Big Bad we've been looking for.
The term "Big Bad" has apparently originated on Buffy, where the fans used it to describe the big villain of the season - now the characters on the show use it as well. (edit)