 However , executive producer Bill Panzer was intrigued by the idea that a mortal would want to spend their life with an Immortal , this choice having several drawbacks . MacLeod does not age , while Tessa is mortal and will age . Despite their mutual wish , they know growing old together is impossible and this uneasy thought " ... haunts them both , sometimes more than others . " As an Immortal , MacLeod is also sterile and Tessa resigns herself to having no children . " The Sea Witch " deals with Tessa 's choice and its impact upon her life . In this episode , Tessa becomes very fond of a four @-@ year @-@ old girl and muses ; " For a while there , just for a few hours ... I felt like she was mine . I liked how it felt . But , she 's not ... I have my own life and it 's more than enough . " Panzer commented that " The Sea Witch " " ... brings forth in a very powerful way what exactly [ Tessa ] ' s giving up to be with MacLeod . " 
 However , executive producer Bill Panzer was intrigued by the idea that a mortal would want to spend their life with an Immortal , this choice having several drawbacks . MacLeod <a href='uninflect' title='1'><mark>does</mark></a> not age , while Tessa <a href='drop_aux' title='2'><mark>is</mark></a>mortal and will age . Despite their mutual wish , they know growing old together <a href='drop_aux' title='3'><mark>is</mark></a>impossible and this uneasy thought " ... haunts them both , sometimes more than others . " As an Immortal , MacLeod is also sterile and Tessa <a href='uninflect' title='4'><mark>resigns</mark></a> herself to having no children . " The Sea Witch " <a href='uninflect' title='5'><mark>deals</mark></a> with Tessa <a href='null_genetive' title='6'><mark>'s</mark></a>choice and its impact upon her life . In this episode , Tessa <a href='uninflect' title='7'><mark>becomes</mark></a> very fond of a four @-@ year @-@ old girl and muses ; " For a while there , just for a few hours ... I felt like she was mine . I liked how it felt . But , she 's not ... I <a href='got' title='8'><mark>have</mark></a> my own life and it 's more than enough . " Panzer commented that " The Sea Witch " " ... <a href='uninflect' title='9'><mark>brings</mark></a> forth in a very powerful way what exactly [ Tessa ] ' s giving up to be with MacLeod . " 
However , executive producer Bill Panzer was intrigued by the idea dat a mortal would want to spend their life wit an Immortal , this choice havin several drawbacks . MacLeod do not age , while Tessa mortal and will age . Despite their mutual wish , they knoe growin old together impossible and this uneasy thought " ... haunts them both , sometimes more than others . " As an Immortal , MacLeod is also sterile and Tessa resign herself to hhavinno children . " The Sea Witch " deal ww/Tessa  choice and its impact upon her life . In dis episode , Tessa become very fond of a four @-@ year @-@ old girl and muses ; " For a while there , jus for a few hours ... I felt like she was mine . I liked how it felt . But , she 's not ... I got my own life and it 's more den enough . " Panzer commented that " The Sea Witch " " ... bring forth in a very powerful way wat exactly [ Tessa ] ' s givin up to b with MacLeod . "