(dub) 6 : The Terrifying City Today

: While patrolling, Saitama encounters Speed-o'-Sound Sonic , who is desperate for a rematch. Saitama eventually subdues him after Sonic begins terrorizing the town to force a fight.

: Reappears as a persistent rival to Saitama. (Dub) 6 : The Terrifying City

: After five days as a professional hero, Saitama learns from Genos that Class C heroes are removed from the registry if they have no heroic activity for a week. : While patrolling

: Two Class A heroes, Golden Ball and Spring Mustachio , are sent to investigate but are defeated by the monster Kombu Infinity . Saitama encounters Speed-o'-Sound Sonic