Kevin Smith has just finished directing the Season 3, episode 7 of “The Flash” — and he has nothing but gratefulness for the entire cast and crew who welcomed him with open arms for the second time.

In a lengthy Instagram post, Smith wrote that directing the episode, titled “Killer Frost,” is like his own version of “baseball fantasy camp.” “It’s like a dream-come-true of being in charge and essential to the process of something you deeply love but are normally outside of,” he explained. “I was never needed here: I just wanted to be here.”

“Let's be honest: all I’ve done is watch the cast and crew do what they do so well without me, week in and week out,” added Smith, before naming some people who had greatly helped him helm his second directorial gig.

“The true on-set brain trust of A.D. [assistant director] Bob Crippen, D.P. [director of photography] Kim Miles and script supervisor Lexy La Roche make the show I adore,” Smith wrote. “Big thanks to the power trio, the entire amazing crew and the incredible cast for making me look good and making me feel like I’m actually a part of one of the best shows on television.”

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

Earlier this month, Smith also 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.

Before starting filming, Smith also took to Instagram to give a little teaser about episode 7. In a post he shared two weeks 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 divulge any more details about what those “first” moments were and which characters would be butting heads in the “sparring spectacle” he mentioned, he wrote that the episode has “got lots more action sequences and fights” compared to the first “The Flash” episode he directed last season. Smith’s first “The Flash” directorial gig was Season 2, episode 21, titled “The Runaway Dinosaur.”

“The Flash” Season 3 premieres on Tuesday, Oct. 4, at 8 p.m. on The CW.