It's the second episode of the fourth season for Covert Affairs , "Dig for Fire". Home from an interesting non-mission that didn't go too well in Columbia, Annie and Auggie are with Arthur at his hotel. He's completely filled in on what's happened and the file Henry Wilcox presented to Annie. The three are on the same side and begin to work together to figure out first, who gave the information to Wilcox and second, what are his motives.
Annie meets with Wilcox once again, this time she's setting him jpnwith fakse informagion and later, with the help of Auggie, traces the phone call he makes right after their meeting to find out who is the mole in the CIA only the other voice is too staticky to recognize.
Arthur's sudden resignation has everyone suspicious, no one believes his alleged affair and reason for steppping down is anything more than a distraction to cover up some larger story, including Joan who secretly enkists Auggie's help to find iut who's the ither woman. The only thing Auggie finds is that Arthur lied about having an affair in order to protect Joan and to get people off his trail which leads to his unknown son Teo Braga back in Columbia. He kept the information from Joan because she has to be completely out of blame, she has a polygraph test to pass and if she knew too much about his cover, she'd fail it.
Agent Seth Newman, has been trying to woo Joan all episode and while he's asking her out on a date, Auggie recognizes his voice as the other voice in the conversation with Henry Wilcox during the traced phonecall meaning he could possibly be the one who leaked information about Arthur and Teo to Wilcox.
Annie sneaks into Seth's home that night while he's out with Joan looking for any information or incriminating evidence. Only, Joan canceled last minute and Seth returns earlier than expected. Before Annie gets caught she rushes to hide in the nearest closet. She observes Seth grab a flashdrive off his desk when he gets home and tell someone on the phone he'd deliver it now but he sense her presence and attacks her.
They fight and it carries on to outside where Annie gets into her car and tries to drive off but Seth drives a bat to her windshield; she proceeds to drive while he's hanging onto her car. They stop mid-bridge and continue to throw punches until one definite blow pushes Seth over a bridge where he falls to the waters below and dies. Meanwhile, back at the hotel, Joan has figured everything out on her own about Arthur and his false affair. She confronts him, he tells the truth and she finally tells him she's pregnant.
Annie again meets with Wilcox. He tells her to go after Teo Braga and kill him. But from the preview for next week's episode, it seems next week Annie and Auggie will find themselves back in Columbia and are not necessarily there to follow any of his orders.