The Viziman Connection, Witcher Wiki

The Viziman Connection is a quest in Chapter III given by Jethro to Geralt after the latter has cleared out the Salamandra hideout in the sewers. After slogging his way through the fisstech lab for Jethro, Geralt emerges from the crypt only to be greeted by the guard who is once again barking orders. This time the witcher has had enough and tells the jailer so in no uncertain terms, but concedes that he will still help, given that Jethro is in no shape to finish the job due to his "little habit"

Gellert Bleinheim - The Official Witcher Wiki

Brehen, Witcher Wiki

Emhyr var Emreis, Witcher Wiki

Vesemir, Witcher Wiki

Half-elf, Witcher Wiki

Soapbox: Why I Don't Hate The Witcher 3: Wild Hunt Anymore

Every Quest That Can Auto-Fail In The Witcher 3

The Witcher (TV series) - Wikipedia

Foltest, Witcher Wiki