Cisco's latest villain-naming (for the Weather Wizard) and the on-screen introduction of Captain Cold's sister, the Golden Glider, and the promise of a bombshell revelation concerning Reverse Flash and Harrison Wells all feature in this all-new promo for "The Flash." Plus, will Mark Hamill's previous turn as the Trickster in the 1990 "Flash" series turn out to be in continuity with the current hit CW show?

"The Flash" returns with a new episode Tuesday, March 17 at 8PM.