Not all Weevils were bad; most of them were happy to remain in the sewers, enjoying the bounty they found there. Occasionally a few would come to the surface and cause trouble, usually males battling over territory, and once in a while one would go rogue, attacking people, but usually they were unobtrusive.
Sometimes though, Weevils did surprising things.
Ianto had followed the one he’d seen lurking outside the tourist office to the docks, where it led him to a scared teenager, badly injured and having a rough time.
“You’ll be okay now,” Ianto reassured him, phoning for an ambulance.