The flash
The Flash 3rd episode airs todayThe CW

The third episode of The Flash airs today, Tuesday, 21st October at 8 pm ET on The CW.

The 3rd episode of the Arrow spinoff show is titled Things You Can't Outrun, and in the episode, Flash battles the Mist, a villain who can transform himself into a toxic gas.

The episode will also introduce in flashback scenes Ronnie Raymond, who reportedly died in the accelerator accident but will instead pop up as 'Firestorm' meta-human in later episodes.

Click here to watch the episode online.

The official synopsis reads:

As Barry (Grant Gustin) and the team at S.T.A.R. Labs work to capture Kyle Nimbus (guest star Anthony Carrigan), a.k.a. The Mist, a dangerous new meta-human with toxic gas powers, they revisit the painful night the particle accelerator exploded and killed Caitlin's (Danielle Panabaker) fiancé, Ronnie (guest star Robbie Amell). Meanwhile, Joe (Jesse Martin) decides to finally visit Henry (John Wesley Shipp) in jail after all these years, but things take a dangerous turn when Kyle shows up looking to punish Joe for arresting him years ago. Meanwhile, Iris (Candice Patton) and Eddie (Rick Cosnett) continue to hide their relationship from Joe.

In the first sneak peek, the group discuss that they need a place well equipped to handle villainous metahumans in Central City.

Here is the 30 second promo released by CW