David McCallum credited as playing...
Donald Mallard
- Donald Mallard: In the 1920s, a cat burglar named Nigel Hubbard left no fingerprints. Baffled Scotland Yard for years. Pineapple contains an acid, pectin. Hubbard pricked each of his fingertips several times and then soaked them in the juice of the fruit. It was very painful, but effective.
- Donald Mallard: Columellar-labial junction.
- Jimmy Palmer: The outer portion of his nose here?
- Donald Mallard: No, no, no, not his; mine. I have a confounded itch. If you would be so kind. Oh, I hate it when it does this.
- Jimmy Palmer: Wait, wait wait...
- [scratches Duck's nose with a cotton swab]
- Donald Mallard: Ahh.
- Donald Mallard: [to Gibbs] I've just been regaling Mr. Palmer on the methods used by criminals to remove their fingerprints over the years. It's fascinating stuff, as is the whole history of dactyloscopy.
- [Gibbs rolls his eyes and walks to the exit]
- Donald Mallard: [unaware that Gibbs has left] It goes back to Edward Henry, inspector General of Bengal in 1897.