- [searching for the rat that ate their evidence]
- Detective Mac Taylor: They're creatures of habit, Aiden. They usually stay within sixty-five feet of their nests. Rats tend to hug the walls and travel the same path back to home. This alley, all this food and garbage, is a four-star cruise to the Bahamas for them.
- Aiden Burn: I take it there were a lot of rats in Chicago?
- Detective Mac Taylor: [smiling] It's too windy.
- [extracting their bullet from a dead rat]
- Aiden Burn: Couldn't we get Dr. Hawkes to do this?
- Detective Mac Taylor: Sheldon draws the line at rodents.
- Donovan Tracy: I didn't do nothin'!
- Detective Don Flack: Yes you did! You got steak sauce on my shoe!
- Aiden Burn: NYPD. Crime Scene Investigators.
- George Albergo: You people deal with rats?
- Aiden Burn: Only when they have eaten our evidence.
- [Detective Mac Taylor has just caught Calvin Montgomery for murder]
- Calvin Montgomery: [who doesn't know that the bullet in his victim was eaten by a rat] Hey, tell me something. Who ratted me out?
- [Examining a victim in autopsy]
- Sheldon Hawkes: What we thought were track marks are... bites. Face, arms, and legs were the appetizers. The gunshot wound was the main course.
- Detective Mac Taylor: And the dinner guest?
- Sheldon Hawkes: This is where the story gets tasty... Rattus norvegicus.
- Detective Mac Taylor: You're telling me a rat ate the bullet?
- Sheldon Hawkes: That was dessert.