'The Flash' Season 2 episode 21 promo and synopsis released: Find out if Barry's really dead in 'The Runaway Dinosaur'

"The Flash" Season 2 has proved that Central City can be as dark and gruesome as Oliver Queen's Star City. Tuesday night's "Rupture," especially, showed the speedster Zoom (Teddy Sears) as more villainous than anything "The Flash" has seen before, including the Reverse Flash.

Major spoilers from "Rupture" and "The Runway Dinosaur" ahead

First and foremost, we need to talk about Barry's seeming death in "Rupture." The DC cinematic Universe has promised a solo "The Flash" film following his appearance in the upcoming "Suicide Squad," which had many fans worry about the future of Barry (Grant Gustin) in the TV show. There were even rumours about Warner Brothers pushing for killing the character off on the CW.

However, the promo for the upcoming Season 2 episode 21 has proved that Barry is not dead, at least for now. All that is left of Barry in Earth-1 is his roasted Flash suit, but Dr Wells (Tom Cavanaugh) is confident that he can bring Barry back.

In the promo for "The Runway Dinosaur" he uses Cisco's (Carlos Valdes) Vibe powers to track Barry. "You brain wave sends the necessary data to pinpoint whatever corner of the universe Barry is stuck in," Wells tells Cisco.

The doubtful, concerned about his friend's wellbeing asks him, "How do we know this is safe?" to which the professor replies, "Define safe."

Also Read: How Cisco's powers help Barry in "The Flash" Season 2 finale

As fans know, it is on Dr Wells' insistence at stopping Zoom and giving Barry his power back, at his own behest that has put Barry in this situation in the first place. Now, his experiments at bringing him back are not working either and Henry (John Wesley Shipp) is agitated.

At some point in the episode Cisco vibes with the help of Barry's suit and we see that he is stuck in an alternate reality, where a Joe (Jesse L Martin) lookalike is holding him captive. "Good to see you Barry, but I'm not Joe," he is seen telling Barry in the promo, further telling him, "You're not going back."

Until Barry and Wells figure out a way to bring him back to Earth-2 2016, someone will have to step up and defeat a returning metahuman, Girder (Greg Finley). Our best bet is that Kid Flash (Keiynan Lonsdale) and Jesse Quick (Violett Beane) will step up.

Fans knew all along that making Wally and Jesse speedsters was the end game and now, possibly that will happen sooner than expected. They were both hit with the waves from the explosion that was contained for Barry.

Check out the spoiler for "The Flash" Season 2 episode 21 "The Runway Dinosaur" here:

With Barry (Grant Gustin) gone, the team must figure out a way to handle the return of an old enemy - Girder (guest star Greg Finley). Realizing Girder is retracing his steps from his last attack, Iris (Candice Patton) volunteers to act as bait to trap him in S.T.A.R. Labs. Meanwhile, Barry fights to return to his old life.