Christopher Hayden is Rory's absentee father that makes the occasional visit to the see the Gilmore Girls throughout the series.
Christopher: I can be a family man. I'm responsible now.
Lorelai: Honey, you can't even buy a book without having your credit card declined.
Christopher: I told Rory not to rat me out. I can't believe she did that!
Lorelai: She didn't. Andrew from the bookstore called, and Jackson, and the UPS guy, and ooh, it was the lead story on the Stars Hollow web page. Then I asked Rory, and she very reluctantly confirmed it. "Rat me out". What are you, 16?
Christopher: I'm sorry.
Lorelai: And what are you doing telling my daughter to lie to me, anyway?
Christopher: She's my daughter, too.
Lorelai: More like your playmate!
Christopher: Nice shirt. Take it off.
Lorelai and Rory turn around staring at the guy on the motorcycle
(Christopher takes off his helmet)