- Alfred Pennyworth: Indeed, Master Bruce, it does seem that with a bit more luck, you could have had him.
- Bruce Wayne: [spotting hairs on the Batman suit] I think I got all of him I need.
- Dr. Francine March-Langstrom: [seeing Kirk on her flight] Kirk. Of all the ridiculous stunts... I told you...
- Dr. Kirk Langstrom: Nope. Francine, this time I talk, you listen. Whoever the creature is, it's not me. The Batman can prove it.
- Dr. Francine March-Langstrom: B-But how? Who?
- Dr. Kirk Langstrom: What's the difference anymore? Come home.
- Batman: You couldn't leave it alone, could you, March? You've re-created the mutagen.
- Dr. March: Re-created it? I've refined it. At night, on my own, so the others wouldn't know. I still believe only a creature like a man-bat can survive the next evolutionary cataclysm. And it will; my new serum could be even more powerful than Kirk's.
- Batman: "Could be"? What do you mean?
- Dr. March: I needed to test it, but before I had the chance...
- Batman: You mean you haven't taken it?
- Dr. March: Of course not. The experimental batch was destroyed. I'll have to...
- Batman: Destroyed how?
- Dr. March: I'd been working through the night. I was just completing the final combination. Francine burst in. I was startled. You have to understand I was very tired. I accidentally dropped the beaker; the whole night's work ruined. Francine never guessed what I'd been doing. She even helped me clean up the mess; all that glass.
- [realizing]
- Dr. March: Oh... oh, my Lord! Francine! The mutagen, it's in her bloodstream now. Oh, no!
- Batman: Is that what it's going to take, your daughter's life, before you end this insanity?
- Alfred Pennyworth: Trouble, Master Bruce?
- Batman: You could say that. Reports of a huge bat creature the size of a man. Remind you of anybody?
- Alfred Pennyworth: Present company excepted, indeed, sir, it does. I take it Dr. Langstrom has somehow become the man-bat again.
- Batman: It seems that way.
- Alfred Pennyworth: You don't suppose he's taking that formula of his again, do you?
- Batman: I don't know, but I know where I can find the answer.
- Batman: If you haven't been taking the formula again, what's all this?
- Dr. Kirk Langstrom: What do you think? I've been trying to clean up after you. Obviously, your so-called antidote didn't work. How could it have if I'm still transforming? Don't you get it yet, Batman? You failed.
- Batman: [taking a device out of his utility belt] All right. Let's prove it. Give me your hand.
- Dr. Kirk Langstrom: What are you doing?
- Batman: A DNA sample. I'll run some tests. We'll see what the truth is.
- Dr. Kirk Langstrom: Francine's gone. She really left me. Not that I can blame her. Who wants to live with a monster?
- Batman: You're not a monster, Langstrom. Not anymore. My tests showed that the original antidote did work after all. I also got a sample of the creature's DNA, and after comparing them, I'm certain the monster is someone else; a new bat creature. We're both off the hook.
- Dr. Kirk Langstrom: But if it's not me, then...
- Batman: Let me worry about that. You've got other problems.
- Batman: I'm sick and tired of cleaning up after you, Langstrom.
- Dr. Kirk Langstrom: So, people have spotted it?
- Batman: Yes. You must have some kind of death wish to take that stuff again, Doctor.
- Dr. Kirk Langstrom: What? You think it's happening deliberately? If I am transforming, then that thing's still inside me. I'm not taking the formula.