Arrow: Preview Clip From "The Man Under the Hood" Introduces Vibe, Killer Frost

The CW have released a new promotional clip from tonight's episode of Arrow, titled "The Man Under the Hood." This clip is special because it's the first on-screen appearance of Caitlin Snow and Cisco Ramon, supporting characters from the upcoming Arrow spinoff The Flash who, in the comics, turn out to be the villain Killer Frost and the superhero Vibe. In fact, Cisco even gives fans a name-drop... The clip below, which ran on Facebook earlier today, features Snow and Ramon working late when they have an unexpected visitor. Unofortunately for all involved, it's Deathstroke.

ARROW "The Man Under the Hood" — (April 16, 2014 8:00-9:00 p.m. ET) (Content Rating TBD) (HDTV) DEATHSTROKE HITS OLIVER AT HOME — Oliver (Stephen Amell), Canary (Caity Lotz), Diggle (David Ramsey) and Felicity (Emily Bett Rickards) return to the lair and find Slade (Manu Bennett) waiting for them. An epic battle breaks out and one member of Team Arrow is sent to the hospital. Thea (Willa Holland) hits her breaking point, but just as Oliver is about to reach her, Slade intervenes and Oliver is faced with a choice – his battle with Slade or his family. Meanwhile, Laurel (Katie Cassidy) struggles with a new secret. Jesse Warn directed the episode with story by Greg Berlanti & Geoff Johns and teleplay by Andrew Kreisberg & Keto Shimizu.