True cases of people suffering from multiple personality disorders are among the most harrowing encounters most of us could ever expect to face this side of the supernatural.
The idea that a person is not just "acting" like wildly different people but wholly inhabited by several distinct personae whom they believe themselves to be is just chilling.
So it's a shame that the movies have rendered such rarities humdrum and routine. But actors just love the idea of slinging several accents and wearing several guises during the course of a film. Halle Berry certainly did.
That goes a long way in explaining Frankie & Alice, a long-shelved 2010 melodrama "based on true events" with six credited screenwriters (and two other writers credited for the story), and nothing new to add to the genre.
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Frankie (Berry) is a good-looking, streetwise stripper in 1970s Watts, Los Angeles. The veteran of the gilded cage/take-it-off club tells a newcomer that she just lets "the music take me, like I'm watching myself from the outside." It's how she copes.
But the stage isn't the only place she does that. All sorts of things can set Frankie off. When she goes, she becomes a drawling, hellfire-and- brimstone quoting Southern belle, railing about "idolatry" and "covetousness" and the coming "wrath of God."
That's a real buzz kill for her love life. That, and her tendency to turn violent and then black out.
One such episode puts her in the reluctant care of free-thinking Dr. Oswald (Stellan Skarsgård). He's wondering if it's her drug use.
Then the doctor meets the other woman in Frankie's head.
"In mah experience, doctors are most always tiresome bores. Or drunks," the personality named Alice acidly drawls. "Which are you, Dr. Oswald?"
Alice tests at a lower IQ, writes with a different hand and feigns racist, anti-Semitic leanings. Oswald, a jazz-listening research scientist-turned-clinician, is fascinated.
Frankie & Alice is a soapy period piece that hits all the usual mileposts in filmed versions of such stories. Frankie refuses to admit she has a problem, but we see flashbacks that hint at the "reasons" for the disorder and meet her protective mother (Phylicia Rashad), who knows more than she lets on.
Skarsgård plays Oswald with a sort of offhanded good humor, but the doctor is a stock "type." And the Oscar-winning Berry, 47, treats this showcase for what it is: an acting exercise, and a fairly broad one. She can and has pulled off versions of these women in other films. The 32-year-old stripper has a hint of "See how well-preserved I am?"
Yes, she is. Of course, she filmed this vanity project almost five years ago, which tends to undercut it as a bid for more Oscar-worthy roles. That and her performance of this unoriginal script.