In the NCIS: Los Angeles episode ‘Payback’, while Deeks (Eric Christian Olsen) does his best to find kidnapped Kensi (Daniela Ruah), she’s being tortured by the mole, aka Sullivan aka CIA Officer Ferris. He’s seeking payback for what Kensi has done to his leg and for her choosing Deeks over him. While he threatens to cut off her leg with a chainsaw, Kensi isn’t buying it.
Sullivan aka CIA Officer Ferris is portrayed by Kurt Yaeger. He’s appeared on many TV shows including Lethal Weapon (Billy Gottlieb) and Pure Genuis (Sgt. John Howard) but he’s best known for his role as Greg the Peg on Sons of Anarchy, Season 5. That prosthetic leg is real. Yaeger was a professional X-games athlete before losing his leg in a horrible accident. NCIS: Los Angeles airs Sundays at 9pm on CBS.