EPISODE 20 – "The Solution"
In order to catch Khasinau and get closer to finding her mother, Sydney and Vaughn set up an undercover sale of a Rambaldi artifact with Khasinau's representative, Mr. Sark. Sloane is forced to make a difficult decision when his terminally ill wife tells Sydney that she knows about SD-6.

EPISODE 21 – "Rendezvous"
Will's life is about to change when he's sent to find the person responsible for leaking information to him about SD-6. Sloane finds himself on the cusp of finally tracking down Khasinau when SD-6 captures "The Man's" right-hand man, Mr. Sark. Dixon becomes suspicious of Sydney's activities and Sloane continues to await the Alliance's decision regarding the fate of his wife.

EPISODE 22 – "Almost Thirty Years"
In order to save Will's life, Sydney and Vaughn must destroy a familiar looking Rambaldi device, while Jack makes a risky deal with Khasinau's representative, Mr. Sark. In a series of dramatic confrontations, Dixon questions Sydney's loyalty, and later she is captured and questioned by Khasinau's boss in a shocking and revealing season finale.