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Genre favorite Greg Grunberg (of Heroes,Watch Four Riders (Hellfighters of the East) Online Aliasand Geeking Outfame) has been tapped for a recurring role on The Flash, Mashablehas learned exclusively.

Grunberg plays Detective Tom Patterson, who makes his debut in Season 3, episode 7, "Killer Frost," airing Nov. 22. A gruff, stalwart figure at Central City Police Department, Det. Patterson is unwavering in his commitment to protecting Central City from the dangerous metas that threaten it. 

"Killer Frost" also happens to be directed by Grunberg's Geeking Outco-host Kevin Smith, who helmed one of the strongest episodes of the show to date last season, "The Runaway Dinosaur."

Here's the episode description for next week's installment:

Caitlin (Danielle Panabaker) uses her powers to save Barry (Grant Gustin), but as her mother predicted, the effort unleashes her inner Killer Frost. Killer Frost goes on a rampage looking for Dr. Alchemy, kidnapping Julian (Tom Felton) and battling both The Flash and Vibe (Carlos Valdes). Meanwhile, Joe (Jesse L. Martin) and H.R. (Tom Cavanagh) have a heart to heart talk.

The Flashairs Tuesdays at 8 p.m. on The CW.

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