What Has Isaiah Washington Been Doing Since Leaving Grey's Anatomy?
Abigail Rogers
Updated on March 07, 2026
Fans of the sci-fi television series and book series "The 100" will be familiar with Isaiah Washington's performance of Chancellor Thelonious Jaha, the final chancellor in charge of the Ark, the space station where humanity has lived following the apocalypse. Washington played Thelonious Jaha in the first five seasons until the character died from blood loss.
When CW's "The 100" opens, the Ark, which was once a haven for humans escaping the inhabitable Earth, is starting to become unsuitable. This devastation then leads to a group being released back onto Earth to find an alternative. There is limited space and increasingly limited supplies to accommodate the growing population, which resulted in Thelonious making somewhat erratic decisions. Not only does he send 100 juvenile delinquents to Earth (where they will more likely than not, die), he is responsible for executing many people.
The role of Thelonious is somewhat different compared to the overly confident, gritty doctor of "Grey's Anatomy." Thelonious was a noble leader, responsible for some difficult decisions that involved sacrifices for the greater good of all inhabitants on Ark. While some of these decisions looking back weren't the best, Thelonious did want the best for the future of humanity and in that attempt, made many mistakes and unnecessarily cruel measures to keep the society in line.