the flash. By Spencer Perry ON. Last night’s episode of The CW’s new DC Comics series “The Flash” introduced a new character of sorts with Gideon, the super computer used by Tom Cavanagh’s Dr. Harrison Wells. Today, TVLine has learned that the voice of Gideon was none other than fan-favorite actress Morena Baccarin! Best known for appearing in “Firefly,” “V,” and “Homeland,” Baccarin has also lent her voice to a number of other DC projects in the past.