Clark Middleton's Glen "Jellybean" Carter will return to help Red and the whole team for a new quest in the upcoming episode of "The Blacklist" Season 4. In line with this, NBC has officially revealed the official plot summary and preview trailer clip of episode 5 "The Lindquist Concern". The previous episode 4 titled as "Gaia" is also recapped here for fans who have failed to watch it.

Clark Middleton officially returns in "The Blacklist" Season 4. According to Christian Today, the American actor will reprise his character as Glen "Jellybean" Carter.

Glen is a machinery cog at the DMV (Department of Motor Vehicles) by day and Red and Co.'s skip tracker at night. He will reappear in the next episode where he will help Red and the whole company to search for Alexander Kirk to save baby Agnes and bring her back to her family. 

Clark's character first debuted in "The Blacklist" Season 2.

As for the official plot synopsis of Episode 5, Spoilers Guide notes, "Elizabeth 'Liz' Keen (Megan Boone) loyalties are tested as Raymond 'Red' Reddington (James Spader) starts to intercept Alexander Kirk (Ulrich Thomsen). Meanwhile, the whole team is on a quest to find a killer who eyes for inventors of the revolutionary technology."

For a quick run-down of the 4th episode of "The Blacklist" Season 4 which is titled "Gaia", Wall Street Journal wrote hat Red led Liz and the team onto an eco-terrorist trail who has a connection to Alexander Kirk.

Elsewhere, Tom Keen (Ryan Eggold) took control of the situation.

"The Blacklist" Season 4 episode 5 with the title of "The Lindquist Concern" is slated to air on October 20, 2016, at 10 p.m. first off on NBC TV Network.

"The Blacklist" is a villainous spine-chilling television series which is all about the life of Red. He is a former U.S. Navy officer who became a criminal who surrendered to the FBI after eluding capture for decades.