'The Flash' Season 1 Spoilers, News: New Villain to Appear on 'Going Rogue'; Starling City Friend Visits Barry

There are at least two reasons to look forward to in the next episode of the hit superhero TV series, "The Flash": first there's a friend from Starling City who'll visit the friendly metahuman hero, and then there's a new "cold" villain to wreak havoc in Central City.

Spoiler news suggests that "Prison Break" alum Wentworth Miller will be playing the villain for the fourth episode entitled, "Going Rogue." Miller will be Captain Cold, an identified leader of a criminal group in possession with a "cold gun."

Furthermore, there's the news that "Arrow" actress Felicity Smoak (Emily Bett Rickards) will in town to visit and team up with the geniuses at S.T.A.R. Labs.

"The Flash (Grant Gustin) stops a robbery but the culprits get away after shooting a guard, and The Flash chooses to save the man instead of following the criminals. Joe (Jesse L. Martin) shows Barry a book of suspects and Barry identifies Leonard Snart (guest star Wentworth Miller, 'Prison Break') as the leader of the group," the synopsis from the press release reads.

"While investigating the case, Barry gets a surprise visit from an old friend – Felicity Smoak (Emily Bett Rickards, 'Arrow'), who heard about his new abilities and came to check them out for herself. She joins him at S.T.A.R. Labs to help stop Snart after it's revealed that Snart his gotten his hands on a stolen 'cold gun,' which could kill The Flash," it continued.

"Dr. Wells (Tom Cavanagh) is furious when he finds out that Cisco (Carlos Valdes) built the cold gun without telling anyone and now it's missing. Meanwhile, Iris (Candice Patton) is getting the silent treatment from Joe because of her relationship with Eddie (Rick Cosnett). Finally, The Flash and Captain Cold have an epic confrontation," the summary added.