 In the two @-@ part finale to series two , " Counterfeit " ( 1994 ) , James Horton ( Peter Hudson ) , a renegade <unk> who believes all Immortals must be eliminated , uses killer Lisa Halle ( Meilani Paul ) to try and kill MacLeod . Lisa undergoes plastic surgery to resemble Tessa and therefore is played by Vandernoot from that point on . MacLeod meets Lisa just after he admitted to himself how much he missed Tessa , and he is stunned by her resemblance with Tessa . Despite knowing that Tessa is dead and cannot return , he eagerly pursues a relationship with Lisa . He eventually admits the truth when he discovers a scar on Lisa 's jaw . Horton kills Lisa on Tessa 's grave before being himself killed by MacLeod . 
