The Flash Season 1, Episode 21, titled , originally aired on May 5, 2015. This episode centers on the introduction of the telepathic gorilla, Grodd, whom Dr. Harrison Wells (Eobard Thawne) unleashes as a distraction while he continues his own plans. Plot Summary
: Team Flash determines that Grodd is hiding in the city's sewer system. Joe, Barry, and Cisco head into the sewers to find him. Grodd quickly overpowers them, using his psychic abilities to disorient Barry and kidnap Joe. The Flash Season 1, Episode 21, titled ,
: Wells completes a device he calls "the key" and inserts it into a hidden chamber in the pipeline, which lights up a long tunnel, presumably his ticket back to his own time. Key Character Moments Plot Summary : Team Flash determines that Grodd
: A masked man attacks gold reserves across the city. The Flash discovers the attacker is actually General Eiling, whose mind is being telepathically controlled by Grodd. : Wells completes a device he calls "the