Although Kevin Smith still has five days to shoot his latest directorial gig on “The Flash,” the comic book writer has already started to get a little bit emotional about the idea of leaving the show’s set in a few days.

“Day 4 of 9 directing on @CW_TheFlash - but I wish it was still Day 1. Gonna hate leaving this wonderful world...,” Smith tweeted, along with a behind-the-scenes photo of Barry (Grant Gustin), Iris (Candice Patton) and Cisco (Carlos Valdes) in S.T.A.R. Labs.

Smith is currently directing Season 3, episode 7, titled “Killer Frost.” Little is known about the episode, but its title suggests that fans might be seeing the return of Caitlin’s (Danielle Panabaker) Earth-2 doppelganger Killer Frost.

Last week, Smith revealed in a tweet that Season 3 main villain Dr. Alchemy is appearing in episode 7. “Love ‘directing’ @CW_TheFlash so much! We shot a scene with Alchemy last night. I had to hide my nerd-boner with my script the whole time...,” he wrote on the social networking site on Sept. 15.

Prior to starting filming, Smith also took to Instagram to give a little tease about episode 7. In a post he shared a week ago, Smith wrote that episode 7 “contains a lot of ‘First’ moments and [a] super heroic sparring spectacle.”

While the 46-year-old filmmaker didn’t expound on what those “first” moments are and which characters would be butting heads in the “sparring spectacle” he mentioned, he has been very vocal that the episode has “got lots more action sequences and fights” compared to the first “The Flash” episode he directed last season.

“Just read the script to the episode of @CW_TheFlash I start working on next week and... I LOVE IT! Lots more action-y stuff than my last ep,” Smith tweeted on Sept. 1.

Smith’s return to “The Flash” director’s chair wasn’t really a big surprise, as Comicbook.com reported last May that everyone on the production of The CW series enjoyed working with him as the director of last season’s episode 21, titled “The Runaway Dinosaur.”

“The Flash” Season 3, episode 1, titled “Flashpoint,” airs on Tuesday, Oct. 4, at 8 p.m. on The CW.

Grant Gustin as Barry, Carlos Valdes as Cisco Kevin Smith, who is currently directing “The Flash” Season 3, Episode 7, titled “Killer Frost,” shared a behind-the-scenes photo of Barry (Grant Gustin), Iris (Candice Patton) and Cisco (Carlos Valdes) in S.T.A.R. Labs. Photo: The CW