Robert Manning Jr.

Reese and Shaw are hunted by Decima; Greer uses Finch's greatest weakness -- his former fiancee -- to lure him out of hiding.

Reese and Finch try to save the Machine's source code before it deteriorates; Root struggles to survive an onslaught of Samaritan's agents; Fusco faces tough questions following the deaths of Dominic and Elias.

Root and Finch race to save the machine after Samaritan locates it. Reese is caught in a showdown between Elias and Dominic.

Reese and Shaw rush to catch up with Finch after he infiltrates a maximum security government facility in a bold and dangerous attempt to destroy Samaritan.

Finch's cover is blown due to a fatal error, which leads to an escalating series of encounters with Samaritan's operatives.

Gideon, Hotchner and their team reopen the unsolved case of a serial killer who has attacked someone for the first time in 20 years.