PHILADELPHIA--(BUSINESS WIRE)--The top 20 TV series on Xfinity On Demand for the week of December 14 – December 20 were: 1. American Horror Story: Freak Show, FX2. State of Affairs, NBC3. Scorpion, CBS4. Homeland, Showtime5. NCIS, CBS6. Ascension (series premiere), SyFy7. NCIS: Los Angeles, CBS8. Chrisley Knows Best, USA9. Kourtney and Khloe Take the Hamptons, E!10. Bad Girls Club, Oxygen11. Colbert Report, Comedy Central12. The Affair, Showtime13. The Newsroom, HBO14. Elementary, CBS15. Once U