PHILADELPHIA--(BUSINESS WIRE)--The top 20 TV series on Xfinity On Demand for the week of April 27 – May 3 were: 1. Game of Thrones, HBO2. The Big Bang Theory, CBS3. The Blacklist, NBC4. Teen Mom OG, MTV5. Law & Order: Special Victims Unit, NBC6. Grey’s Anatomy, ABC7. Love & Hip Hop Atlanta, VH18. Keeping up with the Kardashians, E!9. Modern Family, ABC10. The Last Man on Earth, FOX11. Chicago P.D., NBC12. The Flash, CW13. Secrets and Lies, ABC14. Chicago Fire, NBC15. Dance Moms, Lifetim