"I'm not deluded. I'm possessed," is the sort of line many a brutal killer has trotted out in a bid to land the cop-out insanity plea.

So when criminal psychologist and murder suspect Dr Miranda Grey (Berry) comes out with it she must be regretting it the second after it left her lips.

She is accused of butchering her husband and chief prison administrator Douglas Grey (Charles S Dutton) with an axe in their home.

All she claims to remember is being forced to take a detour from her route home during a tropical downpour and almost running over a mysterious girl standing in the middle of the road.

The action takes place in the sort of facility beloved of film-makers - a gothic pile battered by a ferocious electrical storm and cursed with dodgy wiring.

We all know Dr Grey didn't do it - but who could have? There's prison governor Bernard Hill and fellow shrink Robert Downey Jr, who appears to be picking up the roles Jeff Goldblum can't be bothered with.

It's all a bit The Sixth Sense cooped up in a padded cell with The Shawshank Redemption with neither deserving an early release because of good behaviour.

After a tentative, cliché-ridden beginning, it does settle down to provide a few nervous moments and even the odd jump in your seat shock.

However, the plot's leakier than the prison roof and the revelation of the killer's identity is so clumsily signposted there should have been a neon sign blinking on his (or her) head.

At least Berry makes a more convincing psychologist that J-Lo managed in The Cell...but that's a bit like saying Gillian Taylforth would make a better general secretary of the United Nations than Kylie.

What we are left with is a cast that outclasses the material and carries a movie that would have been a lot less entertaining without them.

Worth a look if only to see Penelope Cruz as a deranged killer harpie (surely life with Tom couldn't have been that bad?).

Tim Evans