S5, E16: Reprisal

Available on iTunes, Prime Video
In the first part of [the] Alias two-hour finale event, 'Reprisal,' Sloane takes Marshall and Rachel hostage in order to discover a crucial clue to Rambaldi's ultimate endgame, as Sydney, Vaughn and APO race to stop him.
Starring Michael Vartan, David Anders, Shaun Duke Moosekian