'The Flash' Sneak Peek: Iris Grows Suspicious of Dr. Wells' Motives (and Firestorm Scoop!)

This video is unavailable because we were unable to load a message from our sponsors.

If you are using ad-blocking software, please disable it and reload the page.

Uh-oh, looks like more people are on to Dr. Harrison Wells!

On tonight’s all-new episode of The Flash, Central City Picture News vet Mason Bridge (Roger Howarth) begins to float the idea to Iris West (Candice Patton) that S.T.A.R. Labs and its leader, Dr. Wells (Tom Cavanagh), may not be all they’re cracked up to be.

Case in point: the particle accelerator explosion. Mason believes the explosion that turned Barry Allen (Grant Gustin) into the Fastest Man Alive was intentionally set off by Dr. Wells, but Iris isn’t so sure, as seen in ETonline’s exclusive sneak peek.

We know Mason is on to something here (points for the Game of Thrones reference!), but will Iris come around before it’s too late?

RELATED: 'The Flash' Star Grant Gustin Reveals 9 Juicy Teases for Rest of the Season


Meanwhile, following the successful separation of Dr. Martin Stein (Victor Garber) and Ronnie Raymond (Robbie Amell), the duo’s attempts at assimilating into everyday life proves challenging. The episode title, “Fallout,” speaks to the repercussions of Martin and Ronnie regaining their individual states of being.

Both men desire to go their separate ways, with Martin attempting to reconnect with his wife and Ronnie hoping to start over with ex-fiancee Caitlin Snow (Danielle Panabaker). But they discover in tonight’s episode that “things are different,” Amell says. “Martin and I aren’t as separate as we thought.”

“That is the essence of the conflict and the drama of the entire character, which is what intrigues me,” Garber tells ETonline. “Once you’ve been to a place you never thought you’d be and then you come back to where you were, you’re not the same person. How do you assimilate and that’s what the episode is really about. As the old saying [goes], ‘You can’t go home again.’”

RELATED: 'The Flash' Boss Teases Reveals Secrets to the Next 'Arrow' Crossover


But are Martin and Ronnie better off separate or together? With the dangerous General Eiling (Clancy Brown) hot on their tail, that’s a question that they’ll have to answer sooner rather than later.

“That’s the dilemma they’re going to have to deal with,” Garber says. “Together they were something extraordinary, so that is an attractive and challenging thing. The dilemma is, can we have both? All of us want it all, so can we manage that? That’s the crux of where these characters are going.”

Dr. Stein also plays a pivotal role in teaching Barry the fundamentals of time travel, after the young Central City Police Department forensic scientist discovers that he was present at his mother’s murder.

“That is a huge hole in Barry’s life – what happened? He’s living with this incredible loss and pain, and Dr. Stein becomes a mentor and father figure because he understands and comes alive talking about time travel and his belief about it. They’re kindred spirits in a way,” Garber says.

He adds: “There’s a scene in this episode that cements that relationship and those sensibilities. That’s what’s so fun about playing the character and where it’s going to lead to in the next little while.”

Of course, when you have Garber on the phone, you have to throw in an Alias question! Would Jack Bristow (aka Spy Daddy) fair well as a metahuman? Garber had his eye set on something grander.

“He’d be joining the Rogues,” he says with a laugh.

Will Iris uncover the truth about Dr. Wells? Do you think Firestorm will become one again? Tell us your thoughts by tweeting Philiana Ng at @insidethetube, and don’t forget that #ETnow hashtag!

The Flash
airs Tuesdays at 8 p.m. on The CW.

We're flashing back to September 2013, just after Grant Gustin was officially announced as The Flash. Watch ET's interview below and find out how the Glee star blew the competition away!