Robbie Amell as Ronnie, Danielle Panabaker as Caitlin
Robbie Amell and Danielle Panabaker are reunited on the set of “The Flash.” The CW

Robbie Amell is back to film “The Flash.” In a new photo he shared on social media, Amell is reunited with his co-star Danielle Panabaker on the S.T.A.R. Labs set of the CW series.

Panabaker shared the same picture on her Twitter account, expressing how much she enjoys the company of her returning co-star.

Amell made his debut on the show as Caitlin’s (Panabaker) fiancé, Ronnie Raymond. Following the particle accelerator explosion, Ronnie — a former structural engineer at S.T.A.R. Labs — became half of the transmuted and conjoint metahuman, Firestorm. After adjusting to his new life as a human torch, Ronnie married Caitlin. Their marriage, however, didn’t last long as Ronnie met his demise in the Season 2 premiere after sacrificing himself to stop the singularity that was consuming Central City.

Twelve episodes later, Amell came back to the show as Ronnie’s Earth-2 doppelgänger, Deathstorm, only to get killed by Season 2’s main villain, Zoom (Teddy Sears).

Entertainment Weekly reported that Amell will return as Ronnie in a winter episode of the show’s Season 3. It’s unclear, however, whether this version of Ronnie is from a different timeline or from another Earth.

Speaking at Emerald City Comic Con last April, Amell revealed that he prefers to go back to the show as Firestorm rather than Deathstorm. “I loved playing Deathstorm but I think it’s tougher to have a serious arc if I’m going back as a bad guy, because I just won’t last as long,” Screen Rant quoted the 28-year-old actor as saying.

“The Flash’s” next episode, titled “Dead or Alive,” airs on Tuesday, Jan. 31 at 8 p.m. EST on The CW. Check out the synopsis and trailer for Season 3, episode 11, below:

“H.R.’s (Tom Cavanagh) past catches up with him when a bounty hunter with vibe powers named Gypsy (Jessica Camacho) arrives in Central City to bring him back to Earth-19 to stand trial for his crime. It turns out inter-dimensional travel is illegal on their Earth. H.R. surrenders but when Barry (Grant Gustin) and Cisco (Carlos Valdes) find out that H.R.’s only hope would be to challenge Gypsy to a fight to the death, they intercede and Cisco offers to fight Gypsy instead.”