The Challenge (1998)

S17E25 No More Mr Nice Engine

Hiro, a kind-hearted and powerful locomotive, faces challenges when Diesel attempts to influence him with a tougher mindset. Diesel believes that showing strength means being ruthless and tries to steer Hiro away from his gentle nature. As tensions rise, Hiro must navigate the pressure to change while staying true to himself and his values. Will he maintain his compassionate spirit, or will Diesel's lessons alter his identity forever?