Sloane takes Marshall and Rachel hostage to try to discover a crucial clue to Rambaldi's game; Sydney and Jack must stop Sloane and Irina from putting their deadly plan into action.

Sloane takes Marshall and Rachel hostage to try to discover a crucial clue to Rambaldi's game as Sydney, Vaughn and the APO race to stop him.

Sydney and Jack must stop Sloane and Irina from putting their deadly plan into action.

Sydney must remain under cover and work with Sark (David Anders) to track down Rambaldi's final clue before Prophet Five finds it.

Sydney must beat Anna Espinosa to the punch when a mysterious implant in Renée has ties to Vaughn; ghostly visions trouble Sloane while he works for Prophet Five.

Sloane learns that Prophet Five's cure for Nadia may kill her; the search for Anna Espinosa continues; Rambaldi's prophetic Page 47 resurfaces; Sydney offers Renée a job at APO.

Sydney cuts her maternity leave short to rescue Will, who has been abducted by Sydney's archnemesis, Anna Espinosa; Sloane gets one step closer to obtaining a cure for Nadia.

Jack needs former agent Weiss and the APO team to search for Sydney after she sends him a distress call; Irina Derevko is a surprise partner to Jack and pregnant Sydney, but her... Full summary

Irina Derevko is a surprise partner to Jack and pregnant Sydney, but her allegiances remain in question; Sloane must scramble when Devlin suspects a mole inside APO.

Jack needs former agent Weiss and the APO team to search for Sydney after she sends him a distress call; Tom's suspicious actions suggest he has a hidden agenda.