"Kill Bill" alum Clark Middleton will officially return in "The Blacklist" Season 4 to help Red and company on a new quest.

In line with this, NBC has finally released the official plot summary of Episode 5 "The Lindquist Concern," while last week's episode "Gaia" is recapped here for fans who have missed to watch it.

According to TV Guide, actor Clark Middleton will reprise his role as Glen "Jellybean" Carter. Jellybean will reappear in "The Lindquist Concern" where Red spots him at a bowling alley. Red and the company will ask for his help in a quest to trace Baby Agnes.

Jellybean happens to be a tracker employee of Red. He first appeared in "The Blacklist" Season 2 on "The Front" episode.

As for the official plot synopsis of "The Blacklist" Season 4 Episode 5, Spoilers Guide notes, "Elizabeth 'Liz' Keen (Megan Boone) loyalties are tested as Raymond 'Red' Reddington (James Spader) takes action on an operation to intercept Alexander Kirk (Ulrich Thomsen). Meanwhile, the Task Force races to find a killer who targets inventors of the revolutionary technology."

For a quick recap of last week's Episode 4 "Gaia", Entertainment Weekly reported that Red directed Liz and the task force onto the trail of an eco-terrorist that is linked to Alexander Kirk.

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

"The Blacklist" Season 4 Episode is titled "The Lindquist Concern". It is scheduled to premiere on Thursday, October 20, 2016, at 10:00 p.m. first and exclusive on NBC.

"The Blacklist" is an American crime thriller television series created by Jon Bokenkamp. It revolves around the story of Raymond "Red" Reddington (James Spader), a former U.S. Navy officer turned high-profile criminal, who voluntarily surrenders to the FBI after eluding capture for decades.