S1, E20: Wolfe's ex-wife Lauren (Rochelle Redfield) is after Immortal Julius Heller (Julian Wadham), a corrupt scientist, and asks Wolfe for help. Amanda remembers how Heller burnt a midwife at the stake like a witch in 1643. Heller kills Lauren. Amanda fights Heller, but they are interrupted by Wolfe before Heller can behead Amanda. Wolfe chases Heller and finally beheads him