Parasyte -the maxim- - Season 1 Episode 8
Freezing Point

Shinichi has regained some semblance of a normal life. However, with Migis cells dispersed throughout his body, his physical abilities have greatly increased to the point that not even Mitsuo poses a threat. Shinichi fears that the changes go beyond the physical and into the psychological. Just as peace returns to his school, a new parasite appears!