I've caught about half the first season of Torchwood,so I didn't walk into it blind...so to speak.
That said....WOW! Marsters was damned good in the ep,and it seemed to show in his performance. You could go along with Capt. Hart's shifting loyality(he's a good guy...no,wait,he's a bad guy...oh,he's got an explosive device slapped to his chest,so we gotta root for him)very easily.
Jules: True,the shifting love lines is something you have to get used to with Torchwood.