The Blacklist Honors Clark Middleton: Here's How the Tribute Episode (and That Guest Star) Came Together TVLine 13/02/2021 Rebecca Iannucci The Blacklist had an unenviable task ahead of it with Friday’s episode: Memorialize actor Clark Middleton, who passed away in 2020, and write out his recurring character, Glen, in an effective way. The resulting hour, titled “The Wellstone Agency,” managed to do both of those things with a moving farewell to both Middleton and his alter ego. Though the episode also furthered Red’s pursuit of Liz, its more poignant focus was the loss of Middleton’s DMV regional manager, who died from West Nile virus as his portrayer did in real life.