Street Fighter II: The Animated Series Episode 21 English Dubbed Episode Title:Compulsion Towards Vengeance – Cyberchip – The Challenge to Mind Control.Episode Description:Ryu has the cyber chip planted on his forehead by Bison. Zoltar created the chip to recruit Shadowlaw warriors for Bison. These cyber chips control the subject's higher brain functions, and thus as long as the cyber chip is on their forehead, Bison can control the subject as he pleases, as Zoltar demonstrates by getting a test subject to bang his head against the wall and kill himself. With Ryu under Bison's control, and Ken unconscious and chained in a bed, Guile and Nash will have to hurry to rescue Ken and Ryu from Bison...