The "Person of Interest" dynamic duo of John Reese (Jim Caviezel) and Harold Finch (Michael Emerson) is one of the best ever created on TV. Season 2 of the show looks to be even more impressive with a whole new dynamic duo. Now that Det. Fusco (Kevin Chapman) and Det. Carter (Taraji P. Henson) know about each other, the show will now have two dynamic duos. The two duos are very different, which should give the show another layer of complexity.
Is it really a quartet?
All four team members know about each other, and they are all working together now. So isn't that a quartet? Probably not. Reese works directly with Finch, but both Reese and Finch are somewhat disconnected from Fusco and Carter. If anyone knew about either Fusco or Carter working with either Reese or Finch, they would all be in danger. That separation naturally splits the quartet into two duos.
The Reese-Finch duo
The relationship between Reese and Finch is a clear hierarchy. Finch is the only one who knows how the Machine works, and therefore holds all the cards. Reese is OK with that, because he just wants to save and protect people.
The only hierarchy between Fusco and Carter, on the other hand, is an intellectual one. While Fusco seems to be a follower, Carter is a leader. Fusco always does what Reese wants. Carter makes her own decisions on each matter and decides whether she believes it is the right thing to do based on her own values (as when she temporarily quit the team at the end of the episode "Baby Blue"). She has never been a blind follower.
The Carter-Fusco duo
Fusco and Carter seem to be the more humorous duo, at least from what was on display in the Season 1 finale episode "Firewall." They do seem to be an odd pairing, perhaps even more than the relationship between Reese and Finch.
Carter always does the right thing, while Fusco prefers to do the right thing for money. Carter is a straight shooter who doesn't have much of a sense of humor. Fusco is sharply sarcastic, humorous to the viewers, but not to the other characters. They are on opposite ends of the spectrum, which seems to create a humorous outcome.
Reese and Finch are also a strange pairing, but not quite on opposite ends of the spectrum. They are both reserved and prefer to stay hidden, and they strive equally to selflessly protect the innocent. Finch chose to work with Reese. The differences they do have are more subtle than the differences between Carter and Fusco. Their differences lend themselves to humorous moments (as in the episode "Super"), but they also lead to interesting moments (as in "Firewall," when Finch helped Reese out of the building where they were trapped) that make the viewer think and wonder what it would be like to be in their shoes.
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Image source: "Super" -- Detective Fusco (Kevin Chapman, right) and Detective Carter (Taraji P. Henson, left) , on PERSON OF INTEREST, Thursday, Jan. 12 (9:00 - 10:00 PM, ET/PT) on the CBS Television Network. Photo: Giovanni Rufino/Warner Bros. ©2011 Warner Bros. Television. All Rights Reserved.