 In " Avenging Angel " ( 1993 ) , MacLeod and Tessa search for information about newborn Immortal Alfred Cahill ( Martin Kemp ) . Becoming Immortal has made Cahill insane ; he believes he is an angel sent by God to free the world from sin . Cahill starts with the last prostitute he met , Tessa 's old friend , Elaine Trent ( Sandra Nelson ) . Tessa is angry to learn the fate of her intelligent , beautiful friend , but later realizes that she " [ sounds ] like her judge and jury . " MacLeod believes that the only way to stop Cahill is to behead him , despite Tessa 's opinion that " Enlightened societies don 't kill their insane . They treat them . " When Cahill comes to the barge looking for MacLeod and finds Tessa alone , Tessa diverts him by welcoming Cahill as a messenger of God . Later , she tells MacLeod with disgust , " I had to crawl inside his head ... I had to think like him ... I had to become like him . " 
 In " Avenging Angel " ( 1993 ) , MacLeod and Tessa search for information about newborn Immortal Alfred Cahill ( Martin Kemp ) . Becoming Immortal <a href='been_done' title='1'><mark>has</mark></a> made Cahill insane ; he <a href='uninflect' title='2'><mark>believes</mark></a> he is an angel sent by God to free the world from sin . Cahill <a href='uninflect' title='3'><mark>starts</mark></a> with the last prostitute he met , Tessa <a href='null_genetive' title='4'><mark>'s</mark></a>old friend , Elaine Trent ( Sandra Nelson ) . Tessa <a href='drop_aux' title='5'><mark>is</mark></a>angry to learn the fate of her intelligent , beautiful friend , but later <a href='uninflect' title='6'><mark>realizes</mark></a> that she " [ <a href='uninflect' title='7'><mark>sounds</mark></a> ] like her judge and jury . " MacLeod <a href='uninflect' title='8'><mark>believes</mark></a> that the only way to stop Cahill is to behead him , despite Tessa <a href='null_genetive' title='9'><mark>'s</mark></a>opinion that " Enlightened societies don 't kill their insane . They treat them . " When Cahill <a href='uninflect' title='10'><mark>comes</mark></a> to the barge looking for MacLeod and <a href='uninflect' title='11'><mark>finds</mark></a> Tessa alone , Tessa <a href='uninflect' title='12'><mark>diverts</mark></a> him by welcoming Cahill as a messenger of God . Later , she <a href='uninflect' title='13'><mark>tells</mark></a> MacLeod with disgust , " I had to crawl inside his head ... I had to think like him ... I had to become like him . " 
In " Avenging Angel " ( 1993 ) , MacLeod and Tessa search for information about newborn Immortal Alfred Cahill ( Martin Kemp ) . Becoming Immortal done made Cahill insane ; he believe he is an angel sent by God to free da world from sin . Cahill start with the last prostitute he met , Tessa  old homie , Elaine Trent ( Sandra Nelson ) . Tessa angry to learn the fate of her intelligent , beautiful fhomie, but later realize that she " [ sound ] like her judge and jury . " MacLeod believe dat the only way to stop Cahill is to behead him , despite Tessa  opinion that " Enlightened societies don 't kill their insane . They treat them . " When Cahill cum to tdabarge lookin for MacLeod and find Tessa alone , Tessa divert him by welcoming Cahill as a messenger of God . Later , she tell MacLeod with disgust , " I had to crawl inside his head ... I had to think like him ... I had to become like em . "