Dean and Sam get kidnapped on this episode. The installment is titled "Hammer of the Gods."
Added:
A crazy hotel is at the center of this Supernatural episode. It's titled "Hammer of the Gods."
Added:

Supernatural Season 5 Episode 19 Quotes

Kali: I never took you for the type.
Gabriel: Romantic?
Kali: Pathetic.

But... me and Kali, we, uh... had a thing. Chick was all hands.

Gabriel