Yamcha is attacked by the Androids. Goku transforms into Super Saiyan and defeats #19, but is suddenly weakened by the heart disease that Trunks had predicted. Vegeta (Super Saiyan) kills #19. #20 (who is Dr. Gero) escapes to the laboratory. Piccolo finds Gero, Trunks helps him, but Gero escapes and activates #17 and #18, who turn against him.