The X Files1993

Frohike:
[examining a used envelope] I got something here. Writing. Somebody wrote on top of the package and left an impression.

Ringo Langly:
Your sci-crime guys at the Bureau have a laser that can measure any change in a surface down to a few nano-meters.

Byers:
Actually, they can lift a perfect impression using magnetic toner and a sheet of Mylar.

Frohike:
Actually...

[while they have been debating, Mulder has used a pencil to make a rubbing of the impression on the envelope]

Mulder:
Actually, it's a phone number, New York City area code.

[hands Frohike the pencil]

Mulder:
Now don't drop that. That's a finely calibrated piece of investigative equipment. I gotta make a phone call.

Frohike:
[looking at the pencil] I'll be damned.