Don Took

Michael is so smitten with Gob's girlfriend that he decides to let her know that Gob has been cheating on her, and Lucille tries to break up Buster and Lucille Austero.

Sydney, having learned that Vaughn is sick, asks Irina if there is an antidote.

Ariana Kane questions Sydney about her father's wearabouts. Meanwhile, Jack gets help from Irina for Sloane's blackmailer.

Jack meets Ariana Kane, head of Alliance counterintelligence, who is investigating Emily's abduction and is blackmailing Sloane.

Vaughn gives Sydney an unexpected Christmas gift; Jack acts to save Sydney when Sloane orders her tortured and killed for being a mole.

Vaughn asks Sydney to use her friendship with Sloane's wife (Amy Irving) to gain access to a book in Sloane's home.