'Counterpart': Ian's story and his past illustrate a tragic premise of the show in a way unlike other counterparts
Considering the fact that in the show one version always kills off the other, Ian's story went a different way as he didn't need a counterpart to erase his other self
The one thing unique about STARZ's 'Counterpart' is the way the characters deal with their counterparts. As the Justin Marks-created show follows the theory of a daughter universe which asserts the existence of two or several versions of the same world, it is the characters and the relationships they share with their counterparts which serve as the most fitting catalyst for the plot's progression.
Unlike any other show, 'Counterpart' does not have a defined scale to differentiate between good and bad. The only person who can be truly distinguished as good or bad is the very character's counterpart, and no other can make that distinction.