Highlander: The Series (1992)

S1E10 Revenge is Sweet

Driven by a desire for vengeance over what she thinks is her lover Walter Reinhardt’s death, Rebecca Lord plays with MacLeod before trying to take his life with Reinhardt's sword. Misled by her beliefs, she is unaware of the world of Immortals or the skills needed for their battles, convinced that MacLeod is responsible for Reinhardt’s demise. However, unbeknownst to her, Reinhardt is very much alive and manipulating Rebecca in a dangerous game to lure MacLeod into a decisive showdown.