The Film: Iron Man (2008)

The Traitor: Obadiah Stane (Jeff Bridges)

Who Do They Betray? Tony Stark (Robert Downey Jr)

It seems few cigar-chomping businessmen in cinema ever get to be shown in a positive light.

Take Stane - he's jealous of Tony's success at the head of his father's company and even more nervous when he decides that Stark Industries should stop making weapons.

So after one terrorist-flavoured attempt on Tony's life fails, Stane takes matters into his own hands, literally rips the life force (AKA his miniature arc reactor) from Tone's chest and uses it to power his own suit for a rampage of destruction.

Comeuppance? Tony's able to crawl to his old arc unit and use its dwindling power to suit up as Iron Man and battle Stane's Iron Monger.

Stane ends up electrocuted and plummets to his death in the large-scale arc reactor at the Stark building. Undone by the very technology he craved! Fitting...



The Film: Harry Potter And The Prisoner Of Azkaban (2004)

The Traitor: Peter Pettigrew (Timothy Spall)

Who Do They Betray? Sirius Black (Gary Oldman)

It's always the squirrelly (or in this case, ratty), misunderstood types, isn't it? Pettigrew is your classic cowed character - afraid to chart his own course and happy to fall in with any group no matter how evil.

Someone should have spotted that he was dangerous when his animal form was revealed as a rat, but he still managed to pull off framing Sirius for 13 murders and having him slung into Azkaban prison.

Comeuppance? He hasn't met his fate in the films yet - but chances are his ultimate end will come in The Deathly Hallows when, after trying to strangle Harry with magical weapon the silver hand, finds the device turning on him when he hesitates over killing the boy who once spared his life.

A quick end for an indecisive little git.

Next: Elsa & Saruman