Role: Alec Trevelyan, British secret agent 006.
Betrayal: He becomes the leader of a terrorist organization trying to destroy Britain.
The Fellowship of the Ring (2001)
Role: Boromir, one of the nine companions assigned to protect Frodo from all who would take the ring.
Betrayal: He tries to take the ring.
Role: Errol Partridge, a policeman in a dystopian future, charged with hunting down and killing those who refuse to take their emotion-suppressing medicine.
Betrayal: He stops taking the medicine.
(Many, many more after the jump.)
Henry VIII (2003)
Role: Robert Aske, a lawyer from a well-connected and noble English family.
Betrayal: He becomes the leader of a rebellion.
Betrayal: He comes up with the Trojan Horse. (Technically not a betrayal, since he is at war with the Trojans. But a dick move nevertheless.)
National Treasure (2004)
Role: Ian Howe, a wealthy businessman who finances Nicolas Cage’s treasure-hunting.
Betrayal: He steals a clue from Cage and tries to kill him, repeatedly.
The Island (2005)
Role: Dr. Merrick, the physician for an underground colony of leotard-wearers.
Betrayal: These people are actually clones, and Merrick is harvesting their organs.
The Hitcher (2007)
Role: John Ryder, a friendly guy whose car has broken down.
Betrayal: He’s a crazy murderer.
And what’s Bean working on now?
Come Like Shadows (2008)
Betrayal: C’mon, this is getting ridiculous.