Smallville: Clark has a twin sister. Some things on Krypton were different too. Supernatural: Sam meets up with said twin sister. What happens when Dean and Sam head to Smallville to talk to their brother Jason? Currently AU.
Crossover - Smallville & Supernatural - Rated: T - English - Drama/Romance - Chapters: 46 - Words: 135,672 - Reviews: 198 - Updated: 10-18-09 - Published: 11-1-07 - Clark K.