Summary & Refresher on Act III for This Thing of Ours.
The summary for Act I is
here.
The summary for Act II is
here.
Previously on This Thing of Ours...
Act III, Part 1 : Dom returns from France bearing 2 Hermes ties as gifts, one which he picked out and one Mal picked out. Dom and Arthur talk about the new laws and regulations that have been passed, the meetings Dom needs to have with the Lieutenant Governor, and how this is going to impact the deal they're working on with Saito, head of the Yakuza. On top of everything else, Arthur is also suspicious that someone has hacked La Cosa Nostra's internal network.
Arthur and Eames agree to keep seeing each other secretly.
At the poker game, Arthur overhears an argument between Ariadne and Yusuf. Arthur offers to have Yusuf removed from the games, but Ariadne tells him not to do that. She says that she had a fling with Yusuf in college, but he doesn't remember, hence their argument.
Arthur determines the identity of the person stealing from Perle, and makes a visit to 'handle' the situation. Arthur also confirms with Yusuf that their internal network has been hacked.
Mal throws Arthur a surprise birthday party despite his protestations. The evening turns into a disaster when Lydia shows up, not especially lucid. Lydia and Arthur get into a very public argument in front of all the guests. Dom comforts Arthur in the aftermath.
Robert Fischer locates Arthur's uncle, Aaron. Arthur meets Aaron. It goes poorly.
Eames gives Arthur a birthday present: a beautiful new watch. He destroys Arthur's old watch in the process--which had been a gift from Dom.
Mal visits Arthur at work, once again with disasterous results.
The stress is starting to get to Arthur. He gets drunk and picks a fight at a bar, ending up in the hospital where Cho works. It turns out that Cho and his longtime partner, Ainsley, have broken up. Cho helps patch up Arthur's injured arm.
Part 2 :
Dom takes Eames for a weekend to Atlantic City over Valentine's Day. Eames poses as a bodyguard during the La Cosa Nostra conference they're attending. He doesn't overhear very much since most of the meetings turn out to be closed door. Apparently, some politicians in league with the organization are nervous.
In contrast, Arthur takes Eames to a shooting range for a belated Valentine's Day date. Eames surprises Arthur with a Valentine's gift as well: the identity of the person hacking the La Cosa Nostra internal network. The hacker is Juana's nephew.
Dom and Arthur convene to confront Juana with the knowledge. She doesn't deny it, and resolves to deal with the situation. At the next poker game, she informs them that her nephew is dead, and that the coroner pronounced it a suicide.
Arthur goes to visit Lydia at White Tree. She had a violent episode and needed to be sedated. Arthur tells her sleeping form that he's doing well, and that she doesn't need to worry. He's doing great.