Mr. Wrench and Mr. Numbers

As shown in the season 2 finale, Numbers and Wrench were friends from childhood, growing up somewhere in the American midwest. Although Numbers did not have a hearing impairment, he learned sign language so as to communicate with his friend. One day, when the two were playing baseball, they were attacked by two older boys, but the fight was interrupted by Hanzee Dent.

The two are committed hitmen, who will perform what is asked of them no matter the circumstances. Mr. Numbers is killed by Lorne Malvo after a long pursuit, which involved killing an innocent man who looked similar to Malvo, in the sixth episode of season one, "Buridan's Ass". Later, Wrench is seen cuffed to his hospital bed, Malvo, rewarding him for coming the closest to killing him that anyone ever did, gives him the key to his restraints and says, "if you still feel raw about things when you heal up, come see me."

Wrench reappears in the season 3 episode "The Law of Inevitability", sitting next to Nikki Swango on a prison bus. Manacled together, they escape from the back of the bus, pursued by Yuri Gurka, who later runs off after his ear is lost to an axe, thrown by Wrench; Nikki and Wrench kill the other assassin pursuing them. The two later venture to points unknown in a car provided by Paul Marrane, whom they meet at a bowling alley. They go on to attempt to blackmail V. M. Varga by breaking into his semi-tractor trailer and stealing sensitive information. Nikki and Wrench ambush Varga and his crew when they come to pay ransom, though Varga escapes. The two part ways, and Nikki gives Wrench the briefcase full of money. She is later killed while trying to kill Emmit Stussy, the brother of her deceased lover Ray Stussy, whom she blamed for his death. Five years later, Wrench tracks down Emmit and kills him.