Major spoilers below.
Elementary returned January 2 with a dandy myth-heavy episode cowritten by series creator Robert
Doherty and Executive Producer Craig Sweeny (who has written or co-written ten episodes to date). The opening montage and scenes reintroduce us to the cast, reminding us of some of their struggles-- the injury that has sidelined Detective Bell (Jon Michael Hill), along with Gregson's (Aidan Quinn) ongoing struggle about the state of his marriage and Watson's (Lucy Liu) desire for some sort of romantic fulfillment juxtaposed against Holmes's (Johnny Lee Miller) ongoing correspondence with the incarcerated Irene Adler/Moriarty (special guest star Natalie Dormer, who gets a lot to do in this episode). Given that three of the four connections here involve the problematics of romance, it is perhaps not surprising that the nature of the relationhsip between Holmes and Moriarty takes center stage in this episode, though even the brief scene with Bell resonates with the episode's interest in the costs and losses the characters face. Unfortunately, Bell appears only in this scene; he's still here, anyway, which is good, but I hope to see his injury plot progress relatively quickly now.
Anyway, the episode reintroduces us to Moriarty's henchman Devon Gaspar (Andrew Howard), hitherto only a voice on the phone but now the architect of the kidnapping of a multi-millionaire's daughter for a ransom of $50,000,000--or that's supposedly what he's after, but things are never that simple, are they? Holmes naturally assumes that Gaspar must somehow be acting upon instructions from Moriarty despite her incarceration and apparent inability to communicate with anyone in the outside world except Holmes (why, exactly, the FBI makes an exception for this corresponence is not elucidated, though possibly Holmes's claim that his ongoing correspondence with Moriarty is purely scientific in nature, reflecting his interest in studying the workings of the mind of a criminal genius, carried some weight with them). Naturally, there is a way for Moriarty to at least receive communications from outside, as alert audience members will recognize the moment we learn she always reads only one newspaper, the New York Ledger. As any Sherlock Holmes fan knows, the classified ads section is a great place to conceal coded messages.
(It's always fun when audiences are given the necessary clues, but I confess to mixed feelings about it when I'm able to figure these things out before they're explained. Also not hard to figure out was that Moriarty's "helpful" sketches of the possible culprits were actually coded messages to those culprits themselves, and even the twist of why Moriarty is cooperating with the police while also communicating secretly with the kidnappers--no, she is not in fact in league with them, but is in fact the kidnap victim's real mother--was relatively easy to deduce; my wife figured it out long before Holmes did.)

Even more interesting are the scenes between Moriarty and Watson, and between Moriarty and Holmes, which elaborate on and tease out further the nexus of their interrelationships. Watson may not be quite Moriarty's intellectual equivalent, but she represents a different grounding for Holmes than Moriarty does; if Moriarty is a pure mind comparable to Holmes's (the only one in the show so far; it remains to be seen whether Conan Doyle's representation of Mycroft as Holmes's smarter brother will be borne out on Elementary, though I expect so), Watson, while no intellectual slouch herself, represents for Holmes a link to emotional intelligence. Tellingly, though Holmes solves the puzzle that reveals the real reason for Moriarty's involvement in events, Watson can read in Moriarty's emotions that there is something other afoot than what seems to be the case. Watching Moriarty and Watson duel is fascinating. This episode suggests very strongly that, going forward, the struggle for Holmes's soul will be carried out by these women--sort of versions of the good angel/bad angel perching on one shoulder each, themselves simplified versions of allegorized figures in medieval morality dramas. Sherlock Holmes psychomachia? Let's hope that Watson and Moriarty are more than mere foils, though that foil function seems pretty clear now.

I look forward to seeing how it develops. What about you? Let me know in the comments section.