Watch Numb3rs S06E08 Ultimatum. Maybe one of the best educational tv series to date, the numb3rs is the favorite tv show by most geeks and other non geeks as well. Now, the latest episode for the series is the Numb3rs Season 6 Episode 8 Ultimatum. In this episode, In the middle of a case where he is tracking down a criminal in charge of a heroin ring inside a prison, Agent Ian Edgerton unexpectedly turns into the murder suspect when the informant he meets with winds up dead, sending Edgerton over the edge when he takes a member of Don’s team hostage. Watch Numb3rs Season 6 Episode 8 Ultimatum Online Stream.