The Flash Season 1 Episode 21 Grodd Lives

When a highly intelligent gorilla named Grodd begins wreaking havoc in Central City, Barry Allen a.k.a. The Flash must team up with Dr. Wells and Caitlin Snow to stop him. Meanwhile, Joe West and Cisco Ramon investigate the murder of a man who may have had ties to Dr. Wells. As The Flash battles Grodd, he also learns more about his connection to the Reverse-Flash and the truth behind the murder investigation. As the stakes get higher and the danger intensifies, The Flash must use his speed and intelligence to save the day and protect those he loves.