CSI: Crime Scene Investigation2000

Greg Sanders:
[spoken while Grissom is looking under a microscope] That's the hair from the spare bedroom.

Gil Grissom:
There's an oily film on the surface of the hair.

Greg Sanders:
Propylene glycol. Active ingredient in Rogaine, for male pattern baldness. Personally, I don't use the stuff, but my grandfather Papa Olaf - he was Bruce Willis at age sixteen. Lucky for me, baldness comes from the mother's side, so I'm safe...

Gil Grissom:
[interrupting] Greg, please, I'm very tired.

Greg Sanders:
Well, maybe the guy we're looking for is going bald... or trying not to. According to Papa Olaf, a lot of guys who use Rogaine also use Propecia, kind of like a cocktail. I ran the hair through MassSpec. I got four peaks - ethyl alcohol, propylene glycol, minoxidil, and finasteride.

Gil Grissom:
Finasteride, the chemical name for Propecia.

Greg Sanders:
But wait, there's more, and it's a family secret. Sexual. Happens in less than two percent of users.

[whispering]

Greg Sanders:
Papa Olaf was one of those people that needed hydraulics.